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| Title | Date | From Archive Folder | Document Type | |
|---|---|---|---|---|
| A. G. Smith to John Cotton Mather regarding the collapse of a dock on the Erie Canal | 19 March 1851 | Documents Relating to 1851 | Correspondence | |
| A. O. Taylor to Joseph M. Maitland informing him that he took Bell to a party and has bought a new buggy with no top | 15 June 1864 | Collection of Joseph M. Maitland | Correspondence | |
| A.B. Sperling to A.F. Williams about his lost right arm | 29 May 1866 | Papers of George May Powell | Correspondence | |
| A.F. Williams to J.W. Sullivan about patents and commissions on artificial limb sales | 1 June 1865 | Papers of George May Powell | Correspondence | |
| Abraham Eustis to Doctor Robert Archer discussing maritime issues | 14 June1837 | Letters and documents relating to the Jeffery/Woodlief families and naval matters | Correspondence | |
| Abraham Lincoln to Gen. Stephen A. Hurlbut about automatic navy rifles | 4 August 1863 | Unassociated Civil War Documents 1863 | Government document; Military document; Correspondence | |
| An account of Cash paid "at Sundry Times to my Compy" | ca. 1776 | The Henry Knox Papers [0015] September-December 1776 | Military document | |
| Act allowing Henry Knox and others to build a canal from the Connecticut River to Boston | 9 March 1792 | The Henry Knox Papers [0107] March 1792 | Government document | |
| Agrarian justice, opposed to agrarian law, and to agrarian monopoly... | ca. 1797 | Documents Relating to 1797 | Pamphlet | |
| Agreement between Henry Knox and Benjamin Bussey | 8 July 1805 | The Henry Knox Papers [0156] July-December 1805 | Business and financial document; Legal document; Land transaction document | |
| Agreement between Wheeler & Goldthwait | 30 November 1772 | The Henry Knox Papers [0005] 1770-1772 | Business and financial document | |
| Agreement to pay for work on a canal | 18 November 1795 | The Henry Knox Papers [0128] October-December 1795 | Correspondence; Business and financial document | |
| Album of Virginia | 1858 | Documents Relating to 1858 | Book; Artwork | |
| Alexander Graham Bell to C. F. Manahan regarding the connection of telephone lines | 12 March 1877 | Documents Relating to the 1870s | Correspondence | |
| Alexander Graham Bell to Clara Hammond McGuigan about issues relating to deaf education and the effectiveness of different sign languages | 12 February 1897 | Documents Relating to the 1890s | Correspondence | |
| Alexander Hamilton to Custom Officers discussing dice's hydrometer | 18 December 1790 | Collection of two documents related to Dycas's Hydrometer | Correspondence | |
| Alexander von Humboldt to James Madison [in French] | 21 July 1814 | Documents Relating to 1814 | Correspondence | |
| Alfred Cowles to A.F. Williams about a good deal for an artificial limb | 26 April 1866 | Papers of George May Powell | Correspondence | |
| Alfred Gibson to Tobias Gibson regarding a ruined cotton crop | 18 May 1857 | Archive of Confederate general & family re: plantation and slaves | Correspondence | |
| Alfred Hughes to Mary Hughes about weather, the origin of races and opinion of Judge Thompson | 5 October 1862 | Collection of Alfred Hughes, a detainee at Camp Chase, Ohio, as a Confederate sympathizer | Correspondence | |
| The American Museum, or Universal Magazine | February 1791 | Documents Relating to 1791 | Newspapers and Magazines | |
| Andrew Oliver to Henry Knox about unfulfilled book orders | 15 June 1774 | The Henry Knox Papers [0009] May-June 1774 | Correspondence; Business and financial document | |
| Andrew Oliver to Henry Knox inquiring about a book order | 4 January 1774 | The Henry Knox Papers [0008] January-April 1774 | Correspondence; Business and financial document | |
| Andrew Oliver to Henry Knox regarding book orders | 19 April 1773 | The Henry Knox Papers [0006] January-May 1773 | Correspondence; Business and financial document | |
| Andrew Oliver to Henry Knox regarding a year-old order for books | 7 March 1774 | The Henry Knox Papers [0008] January-April 1774 | Correspondence; Business and financial document | |
| Andrew Oliver to Henry Knox returning a copy of the Nautical Almanac | 28 March 1773 | The Henry Knox Papers [0006] January-May 1773 | Correspondence; Business and financial document | |
| Anna McSherry to Henry F. McSherry regarding a newspaper report of Henry's ship crashing and their fathers fascination with new technology | 8 July 1866 | Letters to Assistant Surgeon Henry F. McSherry of the U.S. Navy | Correspondence | |
| Anne-César Luzerne to Henry Knox [in French] discussing the delivery of an engraved cannon, as well as exchanging general pleasantries | 20 November 1783 | The Henry Knox Papers [0069] November 1783 | Correspondence | |
| Anthony Dey to Aaron Hobart regarding a flax sample | 18 February 1822 | Aaron Hobart Collection | Correspondence | |
| Appointment of Benjamin J. French | 21 December 1847 | Documents Relating to 1847 | Non-governmental organization document | |
| Appointment of Joseph Jackson Coombs as an examiner-in-chief of the United States Patent Office | 6 August 1861 | Documents Relating to the 1860s | Government document | |
| Archive of Alexander Twining | 1837-1883 | Documents Spanning Decades | Correspondence; Miscellany | |
| Army return for the corps of sappers and miners of Constitution Island, New York | 19 September 1783 | The Henry Knox Papers [0065] 16-30 September 1783 | Military document | |
| Army return for the corps of sappers and miners of Constitution Island, New York [duplicate] | 19 September 1783 | The Henry Knox Papers [0065] 16-30 September 1783 | Military document | |
| Army Return of the Sappers and Miners Corps | 10 October 1783 | The Henry Knox Papers [0066] 1-10 October 1783 | Military document | |
| Article upon the determination of altitudes from observations taken with the barometer... | 1857 | Documents Relating to 1857 | Pamphlet | |
| Articles necessary for a field laboratory | 19 July 1780 | The Henry Knox Papers [0023] July-December 1780 | Military document | |
| Articles of agreement and association, constituting the Magnetic Telegraph Society | 15 May 1845 | The Livingston Family Papers [109] 1836-1897 | Pamphlet | |
| Articles of agreement between H Knox and J. Hills | 8 April 1791 | The Henry Knox Papers [0099] March-April 1791 | Land transaction document | |
| Articles of the Sun-Fire-Society, instituted at Boston 8th May 1765 | ca. 1776-1795 | The Henry Knox Papers [0004] 1760-1769 | Non-governmental organization document | |
| Asa Gray to unknown bookseller about copies of Gray's manual of botany | 13 July 1854 | Documents concerning American explorers, adventurers and naturalists | Correspondence | |
| Autobiographical note related to Henry W. Halleck's work at the New Almaden Quicksilver mines | ca. 1855-1861 | Undated Documents Relating to the Post-Revolutionary Era | Miscellany | |
| Autograph manuscript map of Boston drawn and annotated by Trumbull | September 1775 | Documents Relating to 1775 | Map | |
| Becker's patent table-top "sweetheart" two person stereo viewer | ca. 1867 | Documents Relating to the 1860s | Object | |
| Benjamin Franklin to Marquise de Boulainvilliers discussing a humorous use for Franklin's lightning rods and the marriage of the Marquise's daughter | 1 January 1779 | Documents Relating to 1779 | Correspondence | |
| Benjamin Franklin to Michel G. de Crevecoeur | 16-17 February 1788 | Documents Relating to 1788 | Correspondence | |
| Benjamin Hichborn to Henry Knox about business and American neutrality | 19 October 1793 | The Henry Knox Papers [0120] October-December 1793 | Correspondence | |
| Benjamin Hichborn to Henry Knox about the Waldo patent court decision and the building of a canal | 11 March 1792 | The Henry Knox Papers [0107] March 1792 | Correspondence; Business and financial document | |
| Benjamin Hichborn to Henry Knox regarding canals and foreign affairs | 9 January 1793 | The Henry Knox Papers [0117] January-March 1793 | Correspondence; Business and financial document | |
| Benjamin Hichborn to Henry Knox regarding canals and political affairs in England | 14 December 1792 | The Henry Knox Papers [0116] December 1792 | Correspondence | |
| Benjamin Lincoln to Henry Knox about military repairs and administration | 28 August 1782 | The Henry Knox Papers [0045] August 1782 | Correspondence; Military document | |
| Benjamin Lincoln to Tobias Lear regarding a visit to Philadelphia | 20 October 1791 | Tobias Lear papers | Correspondence | |
| Benjamin West to Henry Knox about book selling | 22 January 1773 | The Henry Knox Papers [0006] January-May 1773 | Correspondence; Business and financial document | |
| Biographical record of Francis B. Ogden | n.d. | Biographical notes on Eighteenth and Nineteenth Century Americans | Miscellany | |
| Birdseye views of roundhouse and train yard in winter | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| Bonner's notes related to a recent meeting of the Association of Manhattan Project scientists in the New York City area | ca. 1 November 1945 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Non-governmental organization document | |
| Books bought from John Bell | 27 January 1780 | The Henry Knox Papers [0022] January-June 1780 | Business and financial document | |
| Boston & Albany boxcars in train yard | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| Boundaries of land belonging to the twenty associates | ca. 1794 | The Henry Knox Papers [0121] January-March 1794 | Legal document | |
| Bullet with brass casing | ca. 1861-1865 | Civil War Objects from Gettysburg National Militay Park | 360 Object | |
| C.B. Lyons to Helen Lyons regarding camp life and motion pictures | 02 July 1918 | Collection of World War I correspondence | Correspondence | |
| Cabinet photograph by H. Rocher of Cyrus H. McCormick, signed | ca. 1875-1880 | Unassociated Photographs of the Civil War | Photograph | |
| Calling card of Samuel F. B. Morse | ca. 1870 | Documents Relating to the 1870s | Miscellany | |
| Canuck/Curtiss hybrid airplane diagrams | ca. June 1982 | Documents relating to Neta Snook, Amelia Earhart's flight instructor | Miscellany | |
| Carte de visite portrait of Samuel F. B. Morse by George C. Rockwood | ca. 1870 | Documents Relating to the 1870s | Photograph | |
| Ceremony of the last rail [Russell #224?] | 10 May 1869 | The Joining of the rails [six albumen photographs of railroad] | Photograph | |
| Ceremony of the last spike [Russell #223] | 10 May 1869 | The Joining of the rails [six albumen photographs of railroad] | Photograph | |
| Certificate admitting John Lorimer to the Aberdonian Medical Society [In Latin] | 9 April 1793 | Collection of items pertaining to Doctor John Lorimer | Non-governmental organization document | |
| Certificate for one share of "Hudson River Steam-Boat Stock" | 1 August 1814 | Documents Relating to 1814 | Business and financial document | |
| Certificate issued by the Royal Icelandic Literary Society [In Icelandic] | 13 September 1791 | Collection of items pertaining to Doctor John Lorimer | Non-governmental organization document | |
| Certificate of Tests | Papers of George May Powell | Non-governmental organization document | ||
| Certification concerning 13 inch shells | 22 July 1780 | The Henry Knox Papers [0023] July-December 1780 | Military document | |
| Certifying copy of patent issued to Nathaniel and Philip W. Miller | 7 May 1818 | Documents Relating to 1818 | Government document; Legal document | |
| Charles E. Walbridge to his mother about offering his brother a job, his surprise at the number of women who are marrying at home and torpedo attacks on "ironsides" | 24 October 1863 | Charles E. Walbridge Collection | Correspondence | |
| Charles E. Walbridge to his mother mentioning the sinking of the steamer "Fanning" and his role as Quartermaster | 7 May 1864 | Charles E. Walbridge Collection | Correspondence | |
| Charles E. Walbridge to his mother sending a rose and discussing torpedo attacks | 8 April 1864 | Charles E. Walbridge Collection | Correspondence | |
| Charles Ellet to A. Thomas regarding family | 15 October 1860 | Unassociated Civil War Documents 1860 | Correspondence | |
| Charles G. Horsfall to my dear children regarding his job delivering mail, a Native American's description of a phonograph and encouraging them to exercise | 09 November 1906 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to my dear children regarding investing in a mine and his work on it | 15 March 1905 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to My son regarding his son attending a church mission and his recent birthday | 17 August 1908 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to "Owen and all" describing his work on building a waterwheel and piers, the health of the Eskimos and a Government Experimental farm | 27 April 1906 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to Owen Horsfall describing children playing in the river, the loss of two dogs and his intent to construct a bridge | 27 October 1901 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to Owen Horsfall discussing Owen's future career, his stake in the mine and family information | 22 July 1905 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to Owen Horsfall regarding attending Owen's college Commencement, leaving the area and a railway line proposal | 19 June 1905 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to Owen Horsfall regarding his investments, Mormons in Germany, his time in Alaska and advice on choosing a wife | 06 October 1909 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to Owen Horsfall regarding his separation from his wife, the strike in Koykuk, politics and the telegraph system | 07 September 1904 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles G. Horsfall to: "my dear boys." describing the weather, his work on a suspension bridge and his animals | 20 April 1902 | Collection of letters of Charles Horsfall | Correspondence | |
| Charles Goodyear to Benjamin Silliman | 20 August 1842 | Documents relating to American inventors | Correspondence | |
| Charles Herbert Allen to John G. Walker regarding his duties as a "Senior Member of a Board for the location of a bridge across the Niagara River" | 19 August 1898 | John Grimes Walker's naval correspondence | Correspondence | |
| Charles Herbert Allen to John G. Walker regarding his duties as a "Senior Member of a Board for the location of a bridge across the Niagara River" | 3 September 1898 | John Grimes Walker's naval correspondence | Correspondence | |
| Charles Sumner to [Arnold] B. Johnson on the benefits of a good water closet | 5 October 1863 | Collection relating to Charles Sumner | Correspondence | |
| Charles Wheeler to A.F. Williams about buying a limb and government subsidies | 24 April 1866 | Papers of George May Powell | Correspondence | |
| Charles-Herbert Walker to John G. Walker with instructions to regard himself as detached from his duties in relation to the bridge over the Niagara River | 30 March 1899 | John Grimes Walker's naval correspondence | Correspondence | |
| Charlie Brinkerhoff to Mr. Condell asking for a leg pamphlet | 14 April 1866 | Papers of George May Powell | Correspondence | |
| Check written out to Robert Fulton | ca. 1801-1813 | Undated Documents Relating to the Post-Revolutionary Era | Business and financial document | |
| Chemical Notes, on Gunpowder and its Materials | 1838 | Documents Relating to 1838 | Pamphlet | |
| Circular letter written by Joel Roberts Poinsett announcing the establishment of the Smithsonian Institution | 10 September 1840 | Documents Relating to 1840 | Correspondence; Pamphlet | |
| Clerical excursionists at Laramie City | 10 May 1869 | The Joining of the rails [six albumen photographs of railroad] | Photograph | |
| Collection of 23 letters pertaining to the Red Cross | 1903 | Unassociated Civil War Documents 1865-1929 | Correspondence | |
| Composite images of railroad tracks going around a curve | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| Contract between The Edison Electric Illuminating Co. of Shamokin, Pennsylvania and Thomas Alva Edison | 4 May 1883 | Documents Relating to the 1880s | Business and financial document | |
| Contract for artificial limbs | 1865 | Papers of George May Powell | Business and financial document | |
| Contract granting a share in the Cannon Rifle | 19 April 1862 | Papers of George May Powell | Legal document; Business and financial document | |
| Contract with Henry H. Sibley, witnessed by H. P. Brewster | 9 March 1857 | Collection of William E. Jones | Legal document; Military document | |
| Copy book of E.R. Archer | 4 August 1878 to 1 October 1878 | Archive of Confederate naval operations: Va. volunteer navy, Tredegar Iron Works | Correspondence; Book; Diary | |
| Cost estimates to build a canal | ca. 1790 | The Henry Knox Papers [0093] 1790 | Business and financial document | |
| Curtiss airplane blueprints | no date. | Documents relating to Neta Snook, Amelia Earhart's flight instructor | Miscellany | |
| Cyrus Hall McCormick to unknown regarding an approaching meeting | 13 April 1867 | Documents Relating to the 1860s | Correspondence | |
| Cyrus West Field to James W. Patterson re: documents, asking views on the Pacific telegraph | 1871/10/17 | Documents Relating to the 1870s | Correspondence | |
| D.M. Scott to A. F. Williams about coming to get a fitting for an artificial limb | 22 June 1866 | Papers of George May Powell | Correspondence | |
| David Cobb to Henry Knox [incomplete] about land surveys | 13 August 1792 | The Henry Knox Papers [0112] August 1792 | Correspondence | |
| David Cobb to Henry Knox about his son accepting a military commission from the President and his hopes to build a canal | 3 April 1791 | The Henry Knox Papers [0099] March-April 1791 | Correspondence | |
| David Cobb to Henry Knox about layout of towns and roads in Maine | 11 October 1795 | The Henry Knox Papers [0128] October-December 1795 | Correspondence | |
| David Cobb to Henry Knox concerning the decision to allow their canal to be built | 11 March 1792 | The Henry Knox Papers [0107] March 1792 | Correspondence; Business and financial document | |
| David Cobb to Henry Knox discussing a canal between the Charles River and Connecticut River | 19 December 1790 | The Henry Knox Papers [0097] October-December 1790 | Correspondence | |
| David Cobb to Henry Knox discussing a possible canal from Boston to the Connecticut River and political elections | 5 December 1792 | The Henry Knox Papers [0116] December 1792 | Correspondence; Government document | |
| David Cobb to Henry Knox on the Canal from the Connecticut River to Boston | 4 September 1791 | The Henry Knox Papers [0102] September-October 1791 | Correspondence; Government document | |
| David Rittenhouse to John Page regarding a solar eclipse | 18 August 1777 | Documents Relating to 1777 | Correspondence | |
| David Smith to an unknown recipient about military signalling | 14 October 1782 | The Henry Knox Papers [0047] October 1782 | Correspondence | |
| the Department of State Patent Office to Nathaniel Cutting regarding appointing arbitrator to settle dispute about a patent for an invention | 16 February 1818 | Documents Relating to 1818 | Correspondence; Government document | |
| Depositions of Andrew Bartholomew and Arthur H. Roorbach concerning their time as steamboat captains | 13 December 1813 | Documents Relating to 1813 | Legal document | |
| Description of an artillery laboratory | 3 March 1777 | The Henry Knox Papers [0016] January-April 1777 | Military document | |
| Description of a rain-gauge | ca. 1815 | Documents Relating to 1815 | Miscellany | |
| Description of the scale of accompanying dais's hydrometer | 1790 | Collection of two documents related to Dycas's Hydrometer | Broadside | |
| Description of township "No 1 in the second range" | 16 December 1786 | The Henry Knox Papers [0078] September-December 1786 | Miscellany | |
| Description of townships | 1786 | The Henry Knox Papers [0077] January-August 1786 | Miscellany | |
| Descriptive book of the Album of Virginia | 1858 | Documents Relating to 1858 | Book | |
| Detailed description of a plow | ca. 1800 | Tobias Lear papers | Business and financial document | |
| Diagram of an arch | ca.1863 | Journal and drawings of bombproofs, with collateral | Miscellany; Military document | |
| Diagram of an fascine | ca.1863 | Journal and drawings of bombproofs, with collateral | Miscellany; Military document | |
| Diagram of a hole dug for an iron cylinder | ca.1863 | Journal and drawings of bombproofs, with collateral | Miscellany; Military document | |
| Diagram of a naval weapon | ca. 27 November 1775 | The Henry Knox Papers [0011] 1775 | Military document; Artwork | |
| Diario de viage de la Comision de limites que puso el gobierno de la Republica bajo la direccion del exmo. sr. general de division d. Manuel de Mier y Teran [in Spanish] | 1850 | Documents Relating to 1850 | Book | |
| Dimensions of a Thrashing Machine belonging to James Tod | ca. 1800 | Tobias Lear papers | Business and financial document | |
| Discussion regarding a small cannon | ca. 1777-1778 | The Henry Knox Papers [0161] Undated: Revolutionary War | Military document | |
| Dr. Tachmyrtis to Blanche Kelso Bruce in regards to a positing on the Woodruff Scientific Expedition | 26 March 1879 | Collection of letters of the first African American to serve a full term in the Senate | Correspondence | |
| Draft of the preliminary statement of the Association of Manhattan District Scientists | ca. August 1945 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Non-governmental organization document | |
| Drawing of dimensions for a spindle | ca. 3 August 1777 | The Livingston Family Papers [084] 1777-1779 | Miscellany | |
| Drawing Plans for a mill | n.d. | The Livingston Family Papers [110] Undated: Miscellany | Miscellany | |
| The duc de la Rochefoucauld to Henry Knox recommending a young man interested in engineering | 29 December 1795 | The Henry Knox Papers [0128] October-December 1795 | Correspondence | |
| E.M. Brink to A.F. Williams asking for price of limbs | 20 April 1866 | Papers of George May Powell | Correspondence | |
| Edmond Charles Édouard Genêt re: improving navigation of Hudson River | ca. 1790 | Documents Relating to 1790 | Non-governmental organization document | |
| Edwin Samuel Gaillard to Sir about artificial limb factories in the South | 16 May 1866 | Papers of George May Powell | Correspondence | |
| Edwin Truell to A. F. Williams requesting a Condell Limbs circular | 12 April 1866 | Papers of George May Powell | Correspondence | |
| Elbridge Gerry to James T. Austin commenting on the loss of a ship, the Ways and Means Committee and the presidency | 23 June 1813 | Documents Relating to 1813 | Correspondence; Government document | |
| An elementary course in civil engineering for the use of the cadets of the United States Military Academy | 1838 | Documents Relating to 1838 | Book; Military document | |
| Elements of military art and science | 18 July 1862 | Unassociated Civil War Documents 1862 | Book | |
| Eli Whitney to John Trumbull introducing the artist Trumbull to another artist, Lucius Manson | 8 May 1819 | Documents relating to American inventors | Correspondence | |
| Eli Whitney to Timothy Pitkin regarding Whitney's business partner | 12 June 1796 | Documents Relating to 1796 | Correspondence | |
| Elias Howe to Tucker about measuring the state room | 18 April 1855 | Documents relating to American inventors | Correspondence | |
| Elisha Gray regarding a copy of an article | 25 March 1898 | Documents Relating to the 1890s | Correspondence | |
| Elisha Kent Kane to Mr. Ticknor with thanks | 17 March 1853 | Documents concerning American explorers, adventurers and naturalists | Correspondence | |
| Employment Agreement | 3 February 1796 | The Henry Knox Papers [0129] January-March 1796 | Legal document | |
| Endorsement by Abraham Lincoln and Winfield Scott | 22 October 1861 | Unassociated Civil War Documents 1861 | Correspondence | |
| Engraving of Samuel F. B. Morse | ca. 1870 | Documents Relating to the 1870s | Artwork | |
| Establishment of the United States Military Philosophical Society | 1 December 1805 | The Henry Knox Papers [0156] July-December 1805 | Correspondence; Military document; Non-governmental organization document | |
| Estimate for a canal built between Barnstable and Buzzard's Bay | 3 December 1791 | The Henry Knox Papers [0103] November-December 1791 | Business and financial document | |
| Estimate of articles necessary for a field laboratory | 17 July 1780 | The Henry Knox Papers [0023] July-December 1780 | Military document | |
| Estimate of expenses regarding a canal | ca. 1790-1820 | The Henry Knox Papers [0163] Undated: Knox as Landlord | Business and financial document | |
| Estimates concerning a canal | ca. 1791 | The Henry Knox Papers [0103] November-December 1791 | Miscellany | |
| Expenditures for first telegraph between Washington, D.C. and Baltimore | 31 March - 8 April 1843 | Documents Relating to 1843 | Business and financial document | |
| Expense of Survey for a Navigation from Connecticut river to Charles river | ca. 1790 | The Henry Knox Papers [0093] 1790 | Miscellany | |
| The Fire-Proof Building Company, of New York | n.d. | Papers of George May Powell | Broadside | |
| Five rare kinetososcope (moving pictures) still photos | 1906-1908 | Documents Relating to the 1900s | Photograph | |
| 'Foster' to his cousin about activities at Brown University | 14 June 1858 | Documents Relating to 1858 | Correspondence | |
| Frederic Pearce to his father about a comet | 1 July 1861 | Collection of Pearce family correspondence | Correspondence | |
| Frederick Eckstein to Robert M. Patterson regarding the Philadelphia General Committee of Defence | 18 September 1814 | Documents relating to the defense of Philadelphia | Military document; Correspondence | |
| From Sandbar to Forbay over the Stanislaus Flume | 4 August 1921 to December 1924 | Documents Relating to the 1920s | Photograph | |
| Full length carte de visite portrait of twins Waino and Plutano | n.d. | Collection of cartes-de-visites | Photograph | |
| General Order. No. 14 | 27 December 1847 | Documents Relating to 1847 | Military document | |
| General Remarks on the Motion of Machines | ca. 1838 | Documents Relating to 1838 | Pamphlet | |
| A geographical description of the United States, with the contiguous countries, including Mexico and the West Indies, intended as an accompaniment to Melish's map of these countries | 1822 | Documents Relating to 1822 | Book | |
| George Brinton McClellan to George D. Ramsay, introducing Mr. Adolph Schniewind | 13 August 1864 | Unassociated Civil War Documents 1864 | Correspondence; Military document | |
| George Brinton McClellan to Jefferson Davis on the island of Hispaniola | 30 September 1854 | Documents Relating to 1854 | Correspondence | |
| George Gordon Meade to Messrs. Bond & Lear discussing telescopes and other merchandise | 6 April 1860 | Documents Relating to the 1860s | Correspondence | |
| George May Powell to Emma C. Small about her illness, work at the Senate and his military inventions | 28 October 1862 | Papers of George May Powell | Correspondence | |
| George May Powell to Emma C. Small about his religious beliefs, his inventions and hospital work and taxes | 1 February 1864 | Papers of George May Powell | Correspondence | |
| George May Powell to Hon. N.C. Ely about fireproofing homes | 10 May 1876 | Papers of George May Powell | Correspondence | |
| George Powell May to "Gents." about fireproofing buildings | 24 January 1883 | Papers of George May Powell | Correspondence | |
| George Powell to "Gentlemen" about an art publication of his and a new invention | 17 February 1882 | Papers of George May Powell | Correspondence | |
| George Powell to Joseph T. Edwards and others about waste in America | 12 May 1886 | Papers of George May Powell | Correspondence | |
| George Turner to A.F. Williams about artificial limbs | 4 May 1866 | Papers of George May Powell | Correspondence | |
| George Turner to Henry Knox about navigation on the Wabash River | ca. 20 December 1791 | The Henry Knox Papers [0103] November-December 1791 | Correspondence | |
| George Ulmer to Henry Knox about court and a bridge | 19 April 1800 | The Henry Knox Papers [0142] January-April 1800 | Correspondence; Land transaction document | |
| George Washington Carver to Grady Porter | 9 August 1931 | Documents Relating to the 1930s | Correspondence | |
| George Washington to Alexander McDougall introducing a military engineer | 21 March 1778 | Documents Relating to 1778 | Correspondence; Military document | |
| George Washington to Benjamin Franklin on the belated peace initiatives of the Howe brothers and experiments with submersibles | July 1776 | Documents Relating to 1776 | Correspondence | |
| George Washington to Burgess Ball regarding the purchase of land | 27 July 1794 | Documents Relating to 1794 | Correspondence; Land transaction document | |
| George Washington to Gov. Edward Rutledge about the European war | 9 September 1799 | Documents Relating to 1799 | Correspondence; Government document; Military document | |
| George Washington to Henry Knox about military experiments | 10 February 1781 | The Henry Knox Papers [0026] February 1781 | Correspondence; Military document | |
| George Washington to Henry Knox regarding supplies needed for military experiments | 10 February 1781 | The Henry Knox Papers [0026] February 1781 | Correspondence; Military document | |
| George Washington to John Fitzgerald about lands and projects on the Ohio, Kanawha and Potomac Rivers | 23 July 1785 | Documents Relating to 1785 | Correspondence; Business and financial document | |
| George Washington to Mrs. Elizabeth Powel regarding a reflecting lamp | 8 September 1787 | Documents Relating to 1787 | Correspondence | |
| George Washington to Tobias Lear recommending a man to work on canal locks | 2 December 1795 | Tobias Lear papers | Correspondence | |
| George Westinghouse to R. R. Robinson thanks Robinson for sending books and enclosing a check for $100 [not present] | 3 February 1913 | Documents Relating to the 1910s | Correspondence | |
| The Great West Illustrated... taken along the line of the Union Pacific Railroad | 1869 | Documents Relating to the 1860s | Photograph | |
| Gustavus Vasa Fox to John Dahlgren explaining that Ericsson will produce 1 inch plates and wants his report on the firing of cannon before he proceeds | 10 June 1862 | Unassociated Civil War Documents 1862 | Correspondence | |
| H. H. Gardner to Tobias Lear regarding his "hoisting machine" | 25 July 1795 | Tobias Lear papers | Correspondence | |
| H.W. Halleck to Edwin M. Stanton regarding ironclad riverboats | 25 March 1862 | Unassociated Civil War Documents 1862 | Correspondence | |
| Hadrosaurus | n.d. | Papers of George May Powell | Miscellany | |
| Hand-held stereocard viewer | ca. 1880-1890 | Documents Relating to the 1880s | Object | |
| Hank S. Clark to Washington regarding troop movements and slaves surrounding the camp | 22 July 1861 | Collection of Franklin W. Fuller, I company, 74th regiment, Illinois, infantry | Correspondence | |
| Harold Urey, scientist, dies at 87; war foe's work led to H-bomb [incomplete] | January 1981 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Newspapers and Magazines | |
| Harry S. Truman to Sir John Anderson referencing a recent visit | 9 January 1946 | Four documents relating to Harry S. Truman | Correspondence | |
| Henry A. Wise to Arnold Elzey regarding Civil War skirmishes and the threat posed by African Americans in the South | 14 January 1863 | Unassociated Civil War Documents 1863 | Correspondence | |
| Henry Jackson to Henry Knox about Boston snows, General Harmar's defeat at the hands of the Indians, the canal idea and a possible European war | 19 December 1790 | The Henry Knox Papers [0097] October-December 1790 | Correspondence | |
| Henry Jackson to Henry Knox about a canal project, the purchase of townships and the offer of a promotion | 4 March 1792 | The Henry Knox Papers [0107] March 1792 | Correspondence; Business and financial document | |
| Henry Jackson to Henry Knox about the Maine land deal and John Hills's canal survey | 28 October 1792 | The Henry Knox Papers [0114] October 1792 | Correspondence; Business and financial document; Government document | |
| Henry Jackson to Henry Knox concerning the Waldo Committee, the reenlistment of soldiers and a canal project | 12 February 1792 | The Henry Knox Papers [0106] February 1792 | Correspondence; Business and financial document | |
| Henry Jackson to Henry Knox on a canal project and discussions over the Waldo lands | 15 February 1792 | The Henry Knox Papers [0106] February 1792 | Correspondence; Business and financial document | |
| Henry Jackson to Henry Knox on a canal, Waldo patent lands and the panic caused by William Duer's finances | 18 March 1792 | The Henry Knox Papers [0107] March 1792 | Correspondence; Business and financial document | |
| Henry Jackson to Henry Knox on John Coffin Jones' potential position as Director of the Bank, plans for the new canal and land matters | 28 August 1791 | The Henry Knox Papers [0101] July-August 1791 | Correspondence; Business and financial document | |
| Henry Jackson to Henry Knox on shares in their canal project and the imprisonment of William Duer | 1 April 1792 | The Henry Knox Papers [0108] April 1792 | Correspondence; Business and financial document | |
| Henry Joseph to W. S. Derrick about Smithsonian Institution matters | 24 April 1850 | Documents relating to American inventors | Correspondence | |
| Henry Knox to Benjamin Lincoln about deficiencies in the supply of ordnance | 22 January 1782 | The Henry Knox Papers [0038] January 1782 | Correspondence; Military document | |
| Henry Knox to Benjamin Lincoln about the establishment of field laboratories | 7 May 1782 | The Henry Knox Papers [0042] May 1782 | Correspondence; Military document | |
| Henry Knox to Benjamin Lincoln about moving artificers from the artillery park | 6 January 1782 | The Henry Knox Papers [0038] January 1782 | Correspondence; Military document | |
| Henry Knox to Benjamin Lincoln about shells | 20 May 1782 | The Henry Knox Papers [0042] May 1782 | Correspondence; Military document | |
| Henry Knox to David Cobb, Henry Jackson, John Coffin Jones and Benjamin Hichborn about a plan to build a canal | 18 June 1792 | The Henry Knox Papers [0110] June 1792 | Correspondence; Government document; Business and financial document | |
| Henry Knox to David Fales about surveying land in Maine | 4 October 1788 | The Henry Knox Papers [0086] October-December 1788 | Correspondence; Land transaction document; Business and financial document | |
| Henry Knox to Ebenezer Dunton, Thomas Vose, and James Waller Head, and [Life] Wilson about saw mills, lumber and canal building | 22 April 1796 | The Henry Knox Papers [0130] April-June 1796 | Correspondence; Business and financial document | |
| Henry Knox to George Clymer concerning a map of the Susquehanna | 29 September 1789 | The Henry Knox Papers [0091] September-October 1789 | Correspondence | |
| Henry Knox to George Ulmer requesting information on lands near Belfast, Maine | 29 September 1788 | The Henry Knox Papers [0085] July-September 1788 | Correspondence; Land transaction document | |
| Henry Knox to Henry Jackson on the price of land and his canal project | 25 March 1792 | The Henry Knox Papers [0107] March 1792 | Correspondence; Business and financial document; Land transaction document | |
| Henry Knox to Isaac Winslow about the lands of the Waldo patent | 24 September 1786 | The Henry Knox Papers [0078] September-December 1786 | Correspondence; Land transaction document | |
| Henry Knox to James Bowdoin about leaving New York and the admission of two Spaniards to the Academy of Arts and Sciences | 23 November 1788 | The Henry Knox Papers [0086] October-December 1788 | Correspondence | |
| Henry Knox to James Byers regarding the casting of artillery | 26 February 1783 | The Henry Knox Papers [0054] 14-28 February 1783 | Correspondence; Military document | |
| Henry Knox to James Malcom asking Malcolm to perform a land survey [incomplete] | 10 October 1806 | The Henry Knox Papers [0158] July-December 1806 | Correspondence; Land transaction document | |
| Henry Knox to James Sullivan about a canal engineer and need for America to rely on its own engineers | 1 February 1794 | The Henry Knox Papers [0121] January-March 1794 | Correspondence | |
| Henry Knox to John Brown about a canal project and states that his investments are tied up in land presently | 22 April 1796 | The Henry Knox Papers [0130] April-June 1796 | Correspondence | |
| Henry Knox to John Bryant regarding the casting of cannons | 2 July 1793 | Archive of Captain John Bryant, Deputy Commissary of Military Stores at the Armory in Springfield, Massachusetts | Correspondence | |
| Henry Knox to John Hills about his good surveying work | 6 June 1791 | The Henry Knox Papers [0100] May-June 1791 | Correspondence | |
| Henry Knox to John Jacob Faesch about shells | 25 May 1782 | The Henry Knox Papers [0042] May 1782 | Correspondence; Military document | |
| Henry Knox to John Jacob Faesch concerning the manufacturing of artillery | 13 August 1782 | The Henry Knox Papers [0045] August 1782 | Correspondence; Military document | |
| Henry Knox to John Maunsell about the public debt and what the United States is doing and discussing foreign affairs | 6 April 1791 | The Henry Knox Papers [0099] March-April 1791 | Correspondence | |
| Henry Knox to John Nazro about patent laws | 24 February 1794 | The Henry Knox Papers [0121] January-March 1794 | Correspondence; Legal document; Land transaction document | |
| Henry Knox to John Quincy Adams about Adams's election as secretary of the Academy of Arts and Sciences | 16 December 1805 | The Henry Knox Papers [0156] July-December 1805 | Correspondence; Non-governmental organization document | |
| Henry Knox to Levi Lincoln about canals | 22 April 1796 | The Henry Knox Papers [0130] April-June 1796 | Correspondence; Business and financial document | |
| Henry Knox to Lucy Flucker Knox about Philadelphia, expelled people from St. Domingo and Washington's visit to a canal | 12 November 1793 | The Henry Knox Papers [0120] October-December 1793 | Correspondence | |
| Henry Knox to Moses Copeland about road building in Maine | 13 September 1794 | The Henry Knox Papers [0123] July-September 1794 | Correspondence; Land transaction document | |
| Henry Knox to Moses Gale and/or Moses Higgins about limestone production and bad quality stone | 23 October 1801 | The Henry Knox Papers [0147] September-October 1801 | Correspondence; Business and financial document | |
| Henry Knox to Peter Charles Varlé asking for canal report | 14 October 1795 | The Henry Knox Papers [0128] October-December 1795 | Correspondence | |
| Henry Knox to Robert Treat Paine | 24 June 1776 | The Henry Knox Papers [0013] May-June 1776 | Correspondence; Military document | |
| Henry Knox to Rufus King about inheritance of the Waldo patent | 13 June 1785 | The Henry Knox Papers [0075] May-August 1785 | Correspondence; Land transaction document | |
| Henry Knox to Sebastian Bauman on his possible engineering career | 7 April 1794 | The Henry Knox Papers [0122] April-June 1794 | Correspondence | |
| Henry Knox to the Secretary of War [Henry Dearborn] praising L'Enfant's work as an engineer | 16 December 1801 | The Henry Knox Papers [0148] November-December 1801 | Correspondence; Military document | |
| Henry Knox to Thomas Hutchins about a survey of the Muscongus patent | 17 December 1787 | The Henry Knox Papers [0082] October-December 1787 | Correspondence; Legal document | |
| Henry Knox to William Smith, Isaiah Thomas, William Hull asking for a surveyor regarding building a canal | 7 April 1791 | The Henry Knox Papers [0099] March-April 1791 | Correspondence; Land transaction document | |
| Henry Knox to Winthrop Sargent about tests on gunpowder | 12 May 1792 | The Henry Knox Papers [0109] May 1792 | Correspondence; Military document | |
| Henry W. Halleck to Brigadier General Cullum, Cairo regarding extending a telegraph | 15 February 1862 | Archive of 104 dispatches, notes and letters from Dept. of Mississippi | Correspondence | |
| Henry W. Halleck to Brigadier General Don Carlos Buell, Louisville regarding constructing a telegraph line | 13 February 1862 | Archive of 104 dispatches, notes and letters from Dept. of Mississippi | Correspondence | |
| Henry W. Halleck to Major General McClellan, Washington regarding communication with Genl. Buell and reinforcements | 7 March 1862 | Archive of 104 dispatches, notes and letters from Dept. of Mississippi | Correspondence | |
| Henry Y. Bell to Condell Leg Manufacturing Corp. | 10 April 1866 | Papers of George May Powell | Correspondence | |
| Hiram Smith to A. F. Williams about picking up his artificial limb | 29 May 1866 | Papers of George May Powell | Correspondence | |
| Hiram Smith to A.F. Williams with limb measurements | 16 April 1866 | Papers of George May Powell | Correspondence | |
| An historical and geographical account of the province and country of Pennsylvania and of West-New-Jersey in America | 1698 | Sixteenth and Seventeenth Century Exploration and Settlement | Book | |
| The history of the New-York African free-school, from their establishment in 1787, to the present time; embracing a period of more than forty years: also a brief account of the successful labors of the New-York Manumission Society | 1830 | Documents Relating to 1830 | Book | |
| Horace Porter to George C. Pullman about revenues, passenger numbers and fuel usage | 9 July 1878 | Documents Relating to the 1870s | Correspondence; Business and financial document | |
| Horace Porter to George C. Pullman with political news and innovations in trains | 12 June 1878 | Documents Relating to the 1870s | Correspondence | |
| Horn's overland guide, from the U.S. Indian sub-agency, Council Bluffs, on the Missouri River, to the City of Sacramento, in California... | 1852 | Documents Relating to 1852 | Book | |
| (House bill, no. 120.) . . . A bill to be entitled An act to compensate Charles E. Stuart, Israel C. Owings and J. H. Taylor for the use of an improvement in instruments for sighting cannon | 26 May 1864 | Confederate imprints: handbills, pamphlets, and Confederate laws | Government document | |
| Ink Diagram of "New Invention of a Corn Mill" | 1701 | The Livingston Family Papers [028] 1701 | Miscellany | |
| Instruments made for the artillery by Mr. John Lamb | 22 May - 2 July 1777 | The Henry Knox Papers [0017] May-August 1777 | Military document; Business and financial document | |
| Interview responses about experiments to grow rubber plants in the United States | ca. February 1928 | Collection of three items related to Thomas Edison and agriculture | Miscellany | |
| Invitation for the President of the National Agricultural Convention | 24 June 1852 | Documents Relating to 1852 | Correspondence | |
| Invoice for books from Thomas [copy] | 18 July 1772 | The Henry Knox Papers [0005] 1770-1772 | Business and financial document | |
| Invoice for books from Thomas Longman | 18 July 1772 | The Henry Knox Papers [0005] 1770-1772 | Business and financial document | |
| Invoices from Wright & Gill | 3 February - 7 March 1772 | The Henry Knox Papers [0005] 1770-1772 | Business and financial document | |
| Ira Allen to George Clinton about Vermont | 23 February 1807 | Documents Relating to 1807 | Correspondence | |
| J. Condell to George May Powell about model arms | 27 March 1866 | Papers of George May Powell | Correspondence | |
| J. Condell to George May Powell about not firing an employee and sending someone to the South | 21 May 1866 | Papers of George May Powell | Correspondence | |
| J. West to Hon. U.S. Frelinghuysen recommending Powell's lecture | 1 November 1873 | Papers of George May Powell | Correspondence | |
| J.A.S. Grant to Professor Owen sending a fossils | 29 April 1873 | Papers of George May Powell | Correspondence | |
| J.T. Paine to A. F. Williams requesting an artificial limbs circular | 25 May 1866 | Papers of George May Powell | Correspondence | |
| James Bowdoin to Henry Knox agreeing to proposed admission of Spanish nobles to Academy of Arts and Sciences | 24 November 1788 | The Henry Knox Papers [0086] October-December 1788 | Correspondence | |
| James Buchanan to Cyrus W. Field congratulating Field on his transatlantic telegraph enterprise | 6 August 1858 | Presidential collection | Correspondence; Business and financial document | |
| James Buchanan to William Milnor Roberts regarding the Cumberland Valley Rail Road | 19 August 1837 | Documents Relating to 1837 | Correspondence | |
| James Burril to George May Powell about a an exhibit of artificial limbs and competition from Georgia and advertising | 23 April 1866 | Papers of George May Powell | Correspondence | |
| James Byers to Henry Knox discussing the casting of cannons | 29 March 1783 | The Henry Knox Papers [0056] 16-31 March 1783 | Correspondence; Military document | |
| James Byers to Henry Knox on the casting of new artillery | 13 February 1783 | The Henry Knox Papers [0053] 1-13 February 1783 | Correspondence; Military document | |
| James Byers to Henry Knox on the setting up of a new foundry | 13 August 1782 | The Henry Knox Papers [0045] August 1782 | Correspondence; Military document | |
| James Byers to Henry Knox regarding the casting of artillery | 19 February 1783 | The Henry Knox Papers [0054] 14-28 February 1783 | Military document | |
| James Malcolm to Henry Knox about a river survey and canal building | 23 March 1796 | The Henry Knox Papers [0129] January-March 1796 | Correspondence; Land transaction document | |
| James Malcolm to Henry Knox about survey results | 7 March 1796 | The Henry Knox Papers [0129] January-March 1796 | Correspondence; Land transaction document | |
| James Monroe to Landon Carter regarding a carriage model he recently received from Carter | 17 June 1811 | Documents Relating to 1811 | Correspondence; Government document | |
| James R. Kelly to Mary Kelly describing the bridge and discussing the change in field commanders | 18 January 1862 | Collection of James R. Kelly, K company, 14th regiment, Indiana, infantry | Correspondence | |
| James R. Kelly to Mary Kelly regarding the estate of C. J. Falkner, someone prowling around his home and the wreckage of the Baltimore and Ohio Railroad yard | 8 March 1862 | Collection of James R. Kelly, K company, 14th regiment, Indiana, infantry | Correspondence | |
| James S. Burrill to George May Powell about expanding artificial limb business into Georgia | 7 May 1866 | Papers of George May Powell | Correspondence | |
| James S. Burrill to George May Powell about waiting for the arm he ordered | 14 April 1866 | Papers of George May Powell | Correspondence | |
| James S. Burrill to George May Powell requesting arm to be sent by express | 20 April 1866 | Papers of George May Powell | Correspondence | |
| James Sullivan and Thomas Russell to Henry Knox about canal building | 9 November 1793 | The Henry Knox Papers [0120] October-December 1793 | Correspondence | |
| James Swan to Henry Knox regarding business in France and the replacement of human labor with machines | 29 March 1788 | The Henry Knox Papers [0083] January-March 1788 | Correspondence; Business and financial document | |
| James W. Ripley to James Woodruff regarding cannons | 21 October 1861 | Unassociated Civil War Documents 1861 | Correspondence | |
| Jay Cooke to F. N. Barrett regarding the publication of a letter | 21 February 1891 | Unassociated Civil War Documents 1865-1929 | Correspondence | |
| Jean Baptiste Gouvion to Henry Knox regarding the Society of Cincinnati | March 1784 | The Henry Knox Papers [0071] January-March 1784 | Correspondence; Non-governmental organization document | |
| Jedediah Morse to Henry Knox about a new edition of his American Geography textbook | 21 December 1791 | The Henry Knox Papers [0103] November-December 1791 | Correspondence | |
| John Adams to Benjamin Rush concerning George Washington, France and scientific societies | 11 November 1807 | Documents Relating to 1807 | Correspondence | |
| John Adams to Robert Fulton on the importance of scientific investigation | 23 June 1813 | Documents Relating to 1813 | Correspondence | |
| John Adams to Samuel Latham Mitchill regarding archaeological matters | 7 February 1817 | Documents Relating to 1817 | Correspondence | |
| John Anderson to George Washington about inventions for artillery | 20 August 1793 | The Henry Knox Papers [0119] July-September 1793 | Correspondence; Military document | |
| John Anderson to George Washington about inventions for artillery | 20 August 1793 | The Henry Knox Papers [0119] July-September 1793 | Correspondence; Military document | |
| John Augusts Roebling to John Linton regarding cement for the building of the first suspension bridge | 9 July 1845 | Documents Relating to 1845 | Correspondence | |
| John Brown to Henry Knox saying people of Worcester and other towns would like a canal to be built | 9 April 1796 | The Henry Knox Papers [0130] April-June 1796 | Correspondence | |
| John Crane to Henry Knox about issues at West Point | 30 April 1782 | The Henry Knox Papers [0041] April 1782 | Correspondence; Military document | |
| John Davis Long to John G. Walker asking to report to the Secretary of War in order to advise on the width of draw or pivot spans in a bridge across the Niagara River | 28 July 1898 | John Grimes Walker's naval correspondence | Correspondence | |
| John Ericsson letter regarding design repairs, possibly for an ironclad | 17 August 1860 | Documents Relating to the 1860s | Correspondence | |
| John Ericsson to Franklin Hanford commenting on Hanford's lecture and discussing an account of a torpedo experiment he published | 8 December 1879 | Documents Relating to the 1870s | Correspondence | |
| John Ericsson to Franklin Hanford discussing torpedo trials and the science that has produced successful results | 25 August 1879 | Documents Relating to the 1870s | Correspondence | |
| John Ericsson to James Bennett defending the merits of the screw propellor | 30 March 1845 | Documents Relating to 1845 | Correspondence | |
| John Ericsson to John B. Kitchen telling him to put off construction of the "Caloric boat" | 4 June 1858 | Documents Relating to 1858 | Correspondence | |
| John Ericsson to Munn & Company about an article on his invention, the ironclad ship | 12 November 1861 | Unassociated Civil War Documents 1861 | Correspondence | |
| John Ericsson to unknown regarding a manual | 17 July 1862 | Documents Relating to the 1860s | Correspondence | |
| John Ericsson to unknown regarding a request for improved engines | 13 December 1859 | Documents Relating to 1859 | Correspondence | |
| John Erisson to unknown about an exhaust valve system | 17 April 1858 | Documents relating to American inventors | Correspondence | |
| John Fitch to John Nicholson regarding a receipt of payment | 13 February 1793 | Documents Relating to 1793 | Correspondence | |
| John Gardiner to Henry Knox about the mechanic Joseph Pope and his latest inventions | 20 August 1791 | The Henry Knox Papers [0101] July-August 1791 | Correspondence; Business and financial document | |
| John Gleason to Henry Knox about a survey in Prospect, Maine | 11 January 1806 | The Henry Knox Papers [0157] January-June 1806 | Correspondence | |
| John Hills to [Henry Knox] about his travels and financial business | 4 October 1792 | The Henry Knox Papers [0114] October 1792 | Correspondence; Business and financial document | |
| John Hills to Henry Knox about his progress surveying land for a canal | 16 September 1792 | The Henry Knox Papers [0113] September 1792 | Correspondence; Business and financial document; Government document | |
| John Hills to Henry Knox about his survey of the route of a canal | 22 July 1792 | The Henry Knox Papers [0111] July 1792 | Correspondence; Business and financial document; Government document | |
| John Hills to Henry Knox about land and surveying | 10 July 1791 | The Henry Knox Papers [0101] July-August 1791 | Land transaction document | |
| John Hills to Henry Knox about the progress of his surveying | 5 August 1792 | The Henry Knox Papers [0112] August 1792 | Correspondence; Business and financial document; Government document | |
| John Hills to Henry Knox mentioning Knox has been appointed Commissioner of a group mapping the eastern United States and asks to be considered for work | 31 March 1796 | The Henry Knox Papers [0129] January-March 1796 | Correspondence | |
| John Hills to Henry Knox regarding his latest surveying efforts to find a route from the Connecticut River to Boston | 7 August 1791 | The Henry Knox Papers [0101] July-August 1791 | Correspondence; Government document | |
| John Hills to Henry Knox with findings of land survey | 2 May 1791 | The Henry Knox Papers [0100] May-June 1791 | Correspondence | |
| John Hills to Henry Knox with land survey updates | 10 May 1791 | The Henry Knox Papers [0100] May-June 1791 | Correspondence | |
| John James Audubon to Richard Harlan regarding journey from Philadelphia to Louisiana and birds he has been studying | 18 November 1829 | Documents Relating to 1829 | Correspondence | |
| John L. Tuttle to Joseph B. Varnum reporting the invention of a new quadrant | 3 March 1806 | Letters to Varnum regarding military and political matters, the Quasi-War, the War of 1812, and patronage | Correspondence | |
| John Lamb to Henry Knox on artillery and ammunition | 19 June 1782 | The Henry Knox Papers [0043] June 1782 | Correspondence; Military document | |
| John Lamb to Henry Knox regarding experiments with howitzers | 6 May 1782 | The Henry Knox Papers [0040] March 1782 | Correspondence; Military document | |
| John Lee to Henry Knox about road building | 11 November 1801 | The Henry Knox Papers [0148] November-December 1801 | Correspondence; Business and financial document | |
| John Marshall to Bushrod Washington regarding the case of Oliver Evans | 28 October 1818 | Documents Relating to 1818 | Correspondence | |
| John Marshall to Jonathan Dayton about a patent for a tide-propelled mill machine | 11 August 1800 | Documents Relating to 1800 | Correspondence | |
| John Maunsell to Henry Knox about French navy and his brother's potato discovery | 8 June 1794 | The Henry Knox Papers [0122] April-June 1794 | Correspondence | |
| John McKellar to Henry Knox asking Knox to use his influence to see him appointed as a lighthouse-keeper | 18 August 1806 | The Henry Knox Papers [0158] July-December 1806 | Correspondence | |
| John Moore to Mary Kelly with an update on westward emigration and the quality of the lands in which he was camped | 22 August 1860 | John Moore Collection | Correspondence | |
| John Quincy Adams to James Mease thanking him for loaning him a pamphlet of weights and measurements | 15 January 1822 | Documents Relating to 1822 | Correspondence | |
| John Quincy Adams to John McLean regarding the responsibility of government to improve transport infrastructure | 6 May 1824 | Documents Relating to 1824 | Correspondence | |
| John Quincy Adams to Robert Fulton asking him to send documentation to secure a patent in Russia | 25 December 1814 | Documents Relating to 1814 | Correspondence | |
| John Quincy Adams to Robert M. Patterson with thanks for new electrotype, improving the art of coining | 29 August 1842 | Documents Relating to 1842 | Correspondence | |
| John Quincy Adams to Solomon Lincoln Esq. | 4 April 1836 | Documents Relating to 1836 | Correspondence | |
| John Quincy Adams to Thomas Aspinwall introducing him to George Bishop, who claims that he has invented a new cloth without spinning and weaving | 15 June 1841 | Documents Relating to 1841 | Correspondence | |
| John Skinner S. to Aaron Hobart requesting support with the publication of "The American Farmer" | 25 November 1822 | Aaron Hobart Collection | Correspondence | |
| John Stevens to John Kean about financial matters | 25 July 1792 | Documents relating to American inventors | Correspondence; Business and financial document | |
| John Trumbull to Henry Knox about new developments in artillery | 15 June 1798 | The Henry Knox Papers [0137] May-August 1798 | Correspondence | |
| John Van Beuren to Robert Livingston regarding a dam at Ancram | 2 July 1784 | The Livingston Family Papers [088] 1784 | Correspondence; Business and financial document | |
| John Vinall to Henry Knox about buying a set of globes | 6 August 1773 | The Henry Knox Papers [0007] June-December 1773 | Correspondence; Business and financial document | |
| John Walker to Thomas Gibbons discussing the beginning of the Panama Canal construction project | 19 July 1904 | Five letters re: the Panama Canal | Correspondence | |
| John Walker to Thomas Gibbons glad to receive a copy of the "Rainbow," a paper published aboard the U.S. Flagship Rainbow | 14 November 1902 | Five letters re: the Panama Canal | Correspondence | |
| John Walker to Thomas Gibbons mentioning that the commission is still waiting for a treaty with Colombia before they can proceed with the panama canal | 31 December 1902 | Five letters re: the Panama Canal | Correspondence | |
| John Walker to Thomas Gibbons regarding the construction of a panama canal | 12 January 1904 | Five letters re: the Panama Canal | Correspondence | |
| John Walker to Thomas Gibbons regarding the treaty with Colombia for the construction of a canal | 23 March 1903 | Five letters re: the Panama Canal | Correspondence | |
| Joining of the rails at Promontory Point [Russell #227] | 10 May 1869 | The Joining of the rails [six albumen photographs of railroad] | Photograph | |
| Joseph Foster Green to William Boud & Son regarding chronometers | 8 October 1861 | Documents Relating to the 1860s | Correspondence | |
| Joseph Francis to Edwards Pierrepont regarding a pontoon bridge | 14 February 1864 | Documents Relating to the 1860s | Correspondence | |
| Joseph Hall to Henry Jackson Knox about Henry Knox's death and a land survey | 6 November 1806 | The Henry Knox Papers [0158] July-December 1806 | Correspondence | |
| Joseph Miller to James Mease regarding the causes of a boiler explosion aboard the steamboat Philadelphia | 29 April 1831 | Documents Relating to 1831 | Correspondence | |
| Joseph W. Farnsworth to Mr. Condell inquiring about artificial limbs | n.d. | Papers of George May Powell | Correspondence | |
| Journal entry on the survey for a canal | 16 July 1792 | The Henry Knox Papers [0111] July 1792 | Diary | |
| Journal of William Ellery's journey from Cranston, Rhode Island, to Philadelphia, Pennsylvania | 10 November 1779 - 15 April 1780 | Collection of five journals chronicling William Ellery's travels to Congress | Diary; Military document | |
| Journal with plans for Bombproof Structures | ca.1863 | Journal and drawings of bombproofs, with collateral | Miscellany; Military document | |
| Jubal Early to Raphael Semmes about being offered a flying machine that can bomb northern cities | 29 August 1873 | Documents Relating to the 1870s | Correspondence | |
| Land agreement between Henry Knox and the inhabitants of Owls Head, Maine | 2 October 1788 | The Henry Knox Papers [0086] October-December 1788 | Land transaction document; Legal document; Business and financial document | |
| Land agreement between Henry Knox and the inhabitants of Owls Head, Maine | 2 October 1788 | The Henry Knox Papers [0086] October-December 1788 | Land transaction document; Legal document; Business and financial document | |
| The laying and completion of the Pacific cable | 1902- 1903 | Documents Relating to the 1900s | Miscellany | |
| Ledger of Peter Cooper | 1836 | Documents Relating to 1836 | Diary | |
| Legal document transferring land to the colony of Rhode Island | 14 June 1776 | Documents Relating to 1776 | Government document; Legal document; Land transaction document | |
| Leonard Cheney to John G. Walker reporting that he was elected at the Triennial Congress of the Naval Order to the office of General Commander | 3 March 1899 | John Grimes Walker's naval correspondence | Correspondence | |
| Leroy Pope Walker to William S. Morris includes a copied version of a dispatch Walker recently received from General Felix Kirk Zollicoffer regarding communication. Walker asks Morris to estimate the cost of this | 9 September 1861 | Unassociated Civil War Documents 1861 | Correspondence | |
| Letter from Alexander P. Anderson to Horace C. Tracy on a variety of subjects | 22 April 1937 | Collection of documents relating to religion and spirituality 1861-1944 | Correspondence | |
| Letter from C. G. Abbot to "Our Heroes Class," First Methodist Church | 8 November 1928 | Collection of documents relating to religion and spirituality 1861-1944 | Correspondence | |
| Letter from Charles Frederick D'Arcy to Mr. Gaskell on the relationship between religion and science | 24 May 1931 | Collection of documents relating to religion and spirituality 1861-1944 | Correspondence | |
| Letter from George Washington Carver to Charles White answering some questions | 26 November 1924 | Collection of documents relating to religion and spirituality 1861-1944 | Correspondence | |
| Letter from George Washington Carver to Mr. Hardwick on spiritual matters | 30 March 1924 | Collection of documents relating to religion and spirituality 1861-1944 | Correspondence | |
| Letter from Warren G. Harding to Robert Coster regarding the modern press | 13 December 1921 | Documents Relating to the 1920s | Correspondence | |
| Letter of introduction from Francisco de Miranda to Henry Knox | 29 March 1790 | The Henry Knox Papers [0094] January-March 1790 | Correspondence | |
| Letter of the Secretary of War, in answer to a resolution of the Senate of the 6th instant, relative to the purchase of extracts of coffee for the use of the troops | 16 January 1862 | Unassociated Civil War Documents 1862 | Correspondence; Military document; Pamphlet | |
| Letter written by John Ericsson to report on the testing of an engine | 28 June 1858 | Documents Relating to 1858 | Correspondence | |
| Letter written by Thomas Paine about a new iron bridge | 1 May 1789 | Documents Relating to 1789 | Correspondence | |
| Letters and sketches: with a narrative of a year's residence among the Indian tribes of the Rocky Mountains | 1843 | Documents Relating to 1843 | Book | |
| Levi Lincoln to Henry Knox about canals | 3 April 1796 | The Henry Knox Papers [0130] April-June 1796 | Correspondence | |
| Lewis Haput Muhlenberg to John G. Walker with whom he was working on the feasibility of creating a canal in Nicaragua | 9 September 1898 | John Grimes Walker's naval correspondence | Correspondence | |
| List of books sent from London to Boston | 16 September 1772 | The Henry Knox Papers [0005] 1770-1772 | Business and financial document | |
| List of goods ordered from Thomas Longman | 10 April 1772 | The Henry Knox Papers [0005] 1770-1772 | Business and financial document | |
| List of letters sent from Samuel F. B. Morse to Edward P. Fry concerning the formation of a telegraph line from New York to Philadelphia in 1844 | ca. 1870 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Correspondence | |
| Locomotives for Saint Louis | December 1841 | Documents Relating to 1841 | Book | |
| Lorin Blodget to Ebenezer Meriam regarding earthquakes & unusual weather changes | 15 January 1853 | Documents Relating to 1853 | Correspondence | |
| Louis Agassiz to unknown about turtle eggs | 22 June 1853 | Documents concerning American explorers, adventurers and naturalists | Correspondence | |
| Louis Agassiz to William Claflin regarding a coast survey | 18 July 1871 | Unassociated Civil War Documents 1865-1929 | Correspondence | |
| Lucretia R. Garfield to Mrs. George W. Childs about her travel plans and the New York subway system | 02 June 1905 | Documents Relating to the 1890s | Correspondence | |
| Luther Burbank to Fred Lockley regarding his stock in cactus companies | 22 October 1907 | Documents Relating to the 1900s | Correspondence | |
| Lyman Bowson to A.F. Williams requesting limbs circular | 19 April 1866 | Papers of George May Powell | Correspondence | |
| M.E. Chase to L.P. Chase, Secretary of the Treasury mentions Fellows as a mutual acquaintance as a way of introduction | 7 October 1861 | Collection of Enoch Q. Fellows, field and staff, 3rd regiment, New Hampshire, infantry | Correspondence | |
| M.M. Taylor to A. F. Williams | 13 April 1866 | Papers of George May Powell | Correspondence | |
| Mahlon Dickerson to the President of the Geological Society of New Haven regarding preparations for the Wilkes expedition | 31 August 1836 | Documents Relating to 1836 | Correspondence | |
| Mammoth portrait photograph inscribed to William Simpkins | ca. 1895 | Documents Relating to the 1890s | Photograph | |
| Manual for Fortification Construction | ca.1863 | Journal and drawings of bombproofs, with collateral | Miscellany; Military document | |
| Manuscript on Fortifications and Combat | ca.1863 | Journal and drawings of bombproofs, with collateral | Miscellany; Military document | |
| Map of Forts Ontario and Oswego and surroundings | ca. 1782-1783 | The Henry Knox Papers [0161] Undated: Revolutionary War | Map; Military document | |
| Map of land | ca. 1796-1806 | The Henry Knox Papers [0163] Undated: Knox as Landlord | Map | |
| Map of Northern Maine | 1830 | The Henry Knox Papers [0159] Post-1806 | Map | |
| Map of part of the Waldo patent | ca. 1790 | The Henry Knox Papers [0093] 1790 | Map | |
| Map of roads in the vicinity of Morristown, New Jersey | 8 January 1777 | The Henry Knox Papers [0016] January-April 1777 | Map; Military document | |
| Map of South Carolina | ca. 1782 | The Henry Knox Papers [0037] 1782 | Map | |
| Map of surveyed land | 1795 | The Henry Knox Papers [0128] October-December 1795 | Map | |
| Map of Yorktown, Virginia | October 1781 | The Henry Knox Papers [0034] October 1781 | Map; Military document | |
| Map to Illustrate Horn's Overland Guide to California and Oregon | 1852 | Documents Relating to 1852 | Map | |
| Martin Van Buren to the Senate of the United States on political matters and how to best use funds in the science and public education fields | 6 December 1838 | Documents Relating to 1838 | Correspondence; Government document | |
| Matthew Perry to Thomas T. Craven with orders to survey an anchorage | 3 January 1844 | Documents Relating to 1844 | Correspondence; Military document | |
| A meditation by Benjamin Pierce on the divine order of the universe | ca. 4 July 1866 | Documents Relating to the 1860s | Miscellany | |
| Memoir of Benjamin Banneker read before the Maryland Historical Society, at the monthly meeting, May 1, 1845 | 1845 | Documents Relating to 1845 | Pamphlet | |
| Memorandum book of E.R. Archer | 20 July 1878 to 31 December 1878 | Archive of Confederate naval operations: Va. volunteer navy, Tredegar Iron Works | Diary; Business and financial document | |
| Mensuration of North River at Dobbs Ferry | ca. 1780 | The Henry Knox Papers [0022] January-June 1780 | Map; Military document | |
| Mettlach Tiles | n.d. | Papers of George May Powell | Business and financial document | |
| Military Pyrotechny, for the use of the Cadets of the U.S. Military Academy, West Point | 1839 | Documents Relating to 1839 | Pamphlet | |
| Monsieur Monvel to Henry Knox about the results of his land survey in Maine | 23 July 1792 | The Henry Knox Papers [0111] July 1792 | Correspondence | |
| Monthly return of the Corps of Sappers & Miners | 24 October 1783 | The Henry Knox Papers [0068] 21-31 October 1783 | Military document | |
| Morris Weiner to Sylvia Weiner | 08 August 1945 | The Weiner Collection | Correspondence | |
| Morris Weiner to Sylvia Weiner | 06 September 1943 | The Weiner Collection | Correspondence | |
| Morris Weiner to Sylvia Weiner | 09 August 1945 | The Weiner Collection | Correspondence | |
| Muster roll of Potomac Company | 18 October 1787 | Documents Relating to 1787 | Military document | |
| N.Y. to sister Bettie discussing family and friends and a 'refrigerator' | 17 September 1875 | Documents Relating to the 1870s | Correspondence | |
| Navigation of Pennsylvania Rivers [Incomplete] | 6 October 1788 | Documents Relating to 1788 | Correspondence | |
| Negro Scientist Shows "Way Out" for Southern Farmers. A Story of George Washington Carver of Tuskegee | 22 December 1929 | Collection of documents relating to religion and spirituality 1861-1944 | Pamphlet | |
| The New-York Times. [Vol. 16, no. 4874 (May 10, 1867)] | 10 May 1867 | Collection of miscellaneous Civil War-era newspapers | Newspapers and Magazines | |
| Newsletter for the Association of Manhattan Project scientists in the New York City area | 1 November 1945 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Non-governmental organization document | |
| Nicholas Cruger to Henry Knox discussing business and the weather | 24 June 1797 | The Henry Knox Papers [0134] May-August 1797 | Correspondence; Business and financial document | |
| Nicola Lewis to Henry Knox regarding artillery | 30 April 1778 | The Henry Knox Papers [0019] 1778 | Correspondence; Military document | |
| Note on boiling or evaporating in a vacuum | ca. 1830 | Documents Relating to 1830 | Miscellany | |
| A note regarding the oldest paper mill in America | n.d. | Sixteenth and Seventeenth Century Exploration and Settlement | Miscellany | |
| Notes from a class on chemical warfare | 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Military document | |
| Notes from land surveys | ca. 1795-1820 | The Henry Knox Papers [0163] Undated: Knox as Landlord | Land transaction document | |
| Notes of a military reconnoissance [sic] from Fort Leavenworth, in Missouri, to San Diego, in California, including part of the Arkansas, Del Norte, and Gila rivers | 1848 | Documents Relating to 1848 | Book | |
| Notes on Architecture | ca. 1838 | Documents Relating to 1838 | Pamphlet | |
| Notes on the Attack and Defence of Permanent Works | October 1838 | Documents Relating to 1838 | Pamphlet | |
| Notes on dried concentrate for lemonade | ca. 1830 | Documents Relating to 1830 | Miscellany | |
| Notes on the establishment of a money unit | 1784-1785 | Documents Relating to 1784 | Pamphlet; Government document | |
| Notes on the evaporation of glue with heated air | ca. 1830 | Documents Relating to 1830 | Miscellany | |
| Notes on Gunpowder, Percussion, Powder, Cannon and Projectiles | 1841 | Documents Relating to 1841 | Pamphlet | |
| Notes on Mines | ca. 1838 | Documents Relating to 1838 | Pamphlet | |
| Notes on the state of Virginia. Written by Thomas Jefferson | 1787 | Documents Relating to 1787 | Book | |
| Observations on the lands adjacent to the Bay of Fundy, its make, produce, inhabitants &c. | n.d. | The Henry Knox Papers [0163] Undated: Knox as Landlord | Miscellany | |
| Observations on the native silk worms of North America | 11 March 1768 | Documents Relating to 1765-1774 | Pamphlet | |
| Observations regarding the firing of artillery (In French) | ca. 1777-1778 | The Henry Knox Papers [0161] Undated: Revolutionary War | Military document | |
| Oliver Evans to Charles Willing Hare about vacating a property | 7 November 1805 | Documents relating to American inventors | Correspondence; Land transaction document | |
| Oliver Evans to Samuel Pitkin concerning a patent for his steam engine design | 23 November 1811 | Documents Relating to 1811 | Correspondence | |
| One Life. Part I. The Great Karoo | 1969 | Collection of documents relating to religion and spirituality 1861-1944 | Miscellany | |
| The Opelousas courier. [Vol. 12, no. 5 (July 2, 1864)] | 2 July 1864 | Collection of Confederate wallpaper newspapers | Newspapers and Magazines | |
| Opium bottle | ca. 1861-1865 | Civil War Objects from Gettysburg National Militay Park | 360 Object | |
| Orchard Cook to Henry Knox about erecting a lighthouse on Franklin Island | 13 February 1806 | The Henry Knox Papers [0157] January-June 1806 | Correspondence | |
| Order to pay an account for a speaking trumpet for use at Fort George | 3 November 1752 | Documents Relating to 1700-1753 | Business and financial document; Military document | |
| Oriental Reception Advertisement | 18 May 1882 | Papers of George May Powell | Miscellany | |
| Original printing of patent for Bell's telephone patent no.174,465] | 7 March 1876 | Documents Relating to the 1870s | Business and financial document | |
| Our vanishing wild life its extermination and preservation, by William T. Hornaday ... with maps and illustrations | 1913 | Documents Relating to the 1910s | Book | |
| Patent for Abraham Lincoln's improvement in buoying vessels over shoals | 22 May 1849 | Documents Relating to 1849 | Government document | |
| Patent for Benjamin Smith's improvement in the door lock | 13 April 1836 | Patents for inventions | Legal document | |
| Patent for Charles Richardson's improvement in blacksmith's cast iron hollow forge backs | 12 March 1836 | Documents Relating to 1836 | Business and financial document | |
| Patent for Edward West's improvement, being a machine for cutting and heading nails | 6 July 1802 | Documents Relating to 1802 | Legal document; Government document | |
| Patent for Enoch Honeywell's improvement, entitled the Water Elevator | 10 July 1830 | Documents Relating to 1830 | Government document; Legal document | |
| Patent for George Chandler's improvement in making nails | 12 December 1796 | Documents Relating to 1796 | Government document | |
| Patent for George M. Selden's improvement in the tide pump basin or reservoir | 10 March 1828 | Documents Relating to 1828 | Business and financial document | |
| Patent for George Smith's improvement in medicine, entitled anti-dyspeptic pills | 11 August 1821 | Documents Relating to 1821 | Business and financial document | |
| Patent for Hercules Thomas' invention of the Herculean Hub, an improvement in hubs for carriage wheels | 8 February 1828 | Documents Relating to 1828 | Business and financial document; Legal document | |
| Patent for improvement of building fireplaces and chimneys, to Cyrus Blood | 6 April 1825 | Documents Relating to 1825 | Business and financial document; Legal document | |
| Patent for Jacob Bromwell's improvement of the wheat fan, or winnowing machine | 26 November 1818 | Documents Relating to 1818 | Business and financial document | |
| Patent for James Morgan's improvement in warping, dressing, and weaving cotton goods by water or other power | 5 April 1821 | Documents Relating to 1821 | Legal document; Government document | |
| Patent for John Babcock's improvement in printer's ball stocks | 18 March 1818 | Documents Relating to 1818 | Legal document; Government document | |
| Patent for John Templeman's improvement in the chain bridge | 16 August 1808 | Documents Relating to 1808 | Legal document; Government document | |
| Patent for Jordan L. Mott's improvement in the process of chilling castings | 13 June 1848 | Documents Relating to 1848 | Legal document; Government document | |
| Patent for Matthias Baldwin's combination of the steam whistle and the boiler | 28 May 1846 | Patents for inventions | Legal document | |
| Patent for Matthias Baldwin's improvements in steam engine cut-off valves | 13 September 1853 | Patents for inventions | Legal document | |
| Patent for Nathan Currier's improvements in a machine designed to excavate and remove earth] | 29 May 1835 | Documents Relating to 1835 | Legal document; Government document | |
| Patent for Otis Tufts' improvement in the power printing press | 22 August 1834 | Documents Relating to 1834 | Legal document; Business and financial document | |
| Patent for Richard Willcox's improvement in metallurgical operations for accelerating and improving the manipulations of metals in general with the use of anthracite coals in particular | 5 April 1831 | Patents for inventions | Legal document | |
| Patent for Schuyler Fisher's improvement in the Hatter's Plank Kettle | 15 July 1816 | Documents Relating to 1816 | Legal document; Government document | |
| Patent for Silas Hyde's improvements in the bedstead | 2 May 1828 | Documents Relating to 1828 | Legal document; Government document | |
| Patent for Simeon Brown's invention for moving brick, stone, or wooden buildings with the chimneys, furniture, and families therein | 31 July 1827 | Documents Relating to 1827 | Legal document; Government document | |
| Patent for Simeon Heath for improvements in the process of tanning | 23 May 1836 | Documents Relating to 1836 | Legal document; Government document | |
| Patent for Stephen H. Long's improvement in the construction of boilers or steam generators, and of wheels for locomotive steam engines | 9 May 1833 | Documents Relating to 1833 | Business and financial document | |
| Patent for Timothy Taylor for improvement in fastening names on horse collars | 11 March 1835 | Documents Relating to 1835 | Business and financial document; Legal document | |
| Patent for William Willis' improvement in the two-cylinder atmospheric steam engine, or generating steam engine | 14 November 1826 | Patents for inventions | Legal document | |
| Patent granted for improvements in horsepower | 30 March 1835 | Documents Relating to 1835 | Business and financial document | |
| Patent issued to Ephraim Gilbert for the construction of gun locks | 3 April 1829 | Documents Relating to 1829 | Business and financial document | |
| Patent issued to Gould Thorp for inventing an improvement to the cooking stove | 5 June 1836 | Documents Relating to 1836 | Legal document | |
| Patent issued to Robert Dennis for improvement to steam engine | 3 November 1825 | Documents Relating to 1825 | Government document; Legal document | |
| Patent to Oliver Teal for excavating earth underwater | 8 December 1829 | Documents Relating to 1829 | Business and financial document | |
| Patent, Camp Cooking Apparatus | 24 September 1861 | Documents Relating to the 1860s | Legal document | |
| Patents filed through 1859-1864 with patent numbers | n.d. | Papers of George May Powell | Legal document; Business and financial document | |
| Paul Jones Semmes to Joseph E. Brown regarding a powder magazine | 25 December 1860 | Unassociated Civil War Documents 1860 | Correspondence | |
| Personal recollections of Mildred Goldberg, secretary to the theoretical group, SAM Laboratories, The Manhattan Project; 1943-1946 | ca. October 1945 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Non-governmental organization document | |
| Peter Charles Varlé to Henry Knox about Knox's canal project [incomplete] | 28 September 1795 | The Henry Knox Papers [0127] July-September 1795 | Correspondence | |
| Peter Charles Varlé to Henry Knox about weather and canal construction [incomplete] | 10 October 1795 | The Henry Knox Papers [0128] October-December 1795 | Correspondence | |
| Peter Charles Varlé to Henry Knox discussing a canal | ca. 1794-1795 | The Henry Knox Papers [0163] Undated: Knox as Landlord | Correspondence | |
| Peter Cooper to Unknown discussing coal and gas | ca. 1830 | Documents Relating to 1830 | Correspondence | |
| Peter Schuyler to Robert Livingston re: iron measurements | 3 September 1785 | The Livingston Family Papers [089] 1785 | Correspondence; Business and financial document | |
| Petition and summons for Harrison C. Goodell adversus David A. Powell | ca. 1841 | Documents Relating to 1841 | Legal document | |
| Petrus DeWitt to Philip Livingston re: sale and purchase of wheat | 23 January 1749 | The Livingston Family Papers [068] 1749 | Correspondence | |
| Philo Remington to Edward Clark about debt to Singer Company and manufacturing sewing machines | 4 December 1877 | Documents Relating to the 1870s | Correspondence; Business and financial document | |
| Photograph of airplane field | n.d. | Collection of Richard H. Jackson, I Company, 9th Regiment, New York Infantry | Photograph | |
| Photograph of the Edison 150-light Dynamo | 1881 | Documents Relating to the 1880s | Photograph | |
| Photograph of the Edison 250-light Dynamo | 1881 | Documents Relating to the 1880s | Photograph | |
| Photograph of Edison Machine Works with Edison and dog in background | 1881 | Documents Relating to the 1880s | Photograph | |
| Photograph of James Irwin on the moon | n.d. | Undated Documents of Gilder Lehrman Collection 1860-1945 | Photograph | |
| Photograph of scientists involved with the Manhattan Project | ca.1945 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Photograph | |
| Plan and elevation of a magazine | circa December 1860 | Unassociated Civil War Documents 1860 | Artwork | |
| Plan for a canal | 1807 | The Henry Knox Papers [0159] Post-1806 | Map; Artwork | |
| Plan of house | 1794 | The Henry Knox Papers [0121] January-March 1794 | Miscellany | |
| Plans for a fort and monument in Tennessee | 1810 | Documents concerning American explorers, adventurers and naturalists | Miscellany | |
| A post script from Thomas Jefferson to Charles Wilson | 28 November 1804 | Documents Relating to 1804 | Correspondence | |
| Powell's Light and Shade Relief Map of Palestine | 1895 | Papers of George May Powell | Map | |
| Powell's Patent Multiscope | n.d. | Papers of George May Powell | Business and financial document; Legal document | |
| Preliminary statement of the Association of Manhattan District Scientists | ca. August 1945 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Non-governmental organization document | |
| Preliminary statement on legislation referring to the future development of atomic energy | ca. August 1945 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Non-governmental organization document | |
| Price List of Mettlach Tiles | 1 January 1875 | Papers of George May Powell | Business and financial document | |
| Proposal for more accurate maps for Waldo patent waterways | n.d. | The Henry Knox Papers [0163] Undated: Knox as Landlord | Business and financial document | |
| Proposition to the Commissioners of Albany with an answer | 10 May 1704 | The Livingston Family Papers [031] 1704 | Government document | |
| Prosthetic Hand | ca. 1861-1865 | Civil War Objects from Gettysburg National Militay Park | 360 Object | |
| Provision return for non-commissioned officers and privates belonging to the Corps of Sappers and Miners | 17 July 1783 | The Henry Knox Papers [0061] 16-31 July 1783 | Military document | |
| Provision return for non-commissioned officers and privates belonging to the corps of sappers and miners | 21 July 1783 | The Henry Knox Papers [0061] 16-31 July 1783 | Military document | |
| Provision return for non-commissioned officers and privates belonging to the corps of sappers and miners | ca. 16 July 1783 | The Henry Knox Papers [0061] 16-31 July 1783 | Military document | |
| Radical Key Map of Palestine in the Time of Our Savior | 1897 | Papers of George May Powell | Map | |
| Railroad officials [Russell #225b] | 10 May 1869 | The Joining of the rails [six albumen photographs of railroad] | Photograph | |
| Randall Lee Gibson to his father Tobias Gibson regarding the crops at Live Oaks and Greenwood plantations | 16 September 1858 | Archive of Confederate general & family re: plantation and slaves | Correspondence | |
| Receipt for a $50 donation | 18 December 1791 | Documents Relating to 1791 | Business and financial document | |
| Receipt for Robert Stocton for payment in full | 15 May 1775 | Documents relating to American inventors | Business and financial document | |
| Receipt from Captain Steven Adams to Parker Cleaveland | 29 May 1812 - 9 November 1813 | Documents Relating to 1812 | Business and financial document | |
| A receipt to dress white leather | 17 April 1748 | Collection of 73 documents relating to Plymouth, Dartmouth Township, and environs | Miscellany | |
| Receipt to Thomas Ward for materials, including chemicals | 21 October 1845 | Texana: documents, many relating to Thomas Ward & archives war | Business and financial document | |
| Regarding a canal [incomplete] | ca. 1794-1795 | The Henry Knox Papers [0163] Undated: Knox as Landlord | Business and financial document | |
| Renunciation of claim by N. Roosevelt against Robert R. Livingston and John Stevens | 28 August 1811 | Documents Relating to 1811 | Legal document; Business and financial document | |
| Report of a meeting held at the town house concerning a grist mill | 1 November 1726 | Collection of 73 documents relating to Plymouth, Dartmouth Township, and environs | Land transaction document | |
| Report on establishing a uniformity in weights and measures | 1790 | Documents Relating to 1790 | Pamphlet | |
| Report on the United States and Mexican boundary survey made under the direction of the Secretary of the Interior Part 1 | 1857-1859 | Documents Relating to 1858 | Book | |
| Report on the United States and Mexican boundary survey made under the direction of the Secretary of the Interior Part 2 | 1857-1859 | Documents Relating to 1858 | Book | |
| Report on the United States and Mexican boundary Survey... | 1857-1859 | Documents Relating to 1858 | Book | |
| Report upon the Colorado River of the west, explored in 1857 and 1858 by Lieutenant Joseph C. Ives, corps of totgraphical engineers, under the direction of the office of explorations and surveys, A. A. Humphreys, captain of topographical engineers, in charge. | 1861 | Documents Relating to the 1860s | Book | |
| Reports of explorations and surveys to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean made under the Secretary of War, in 1853-5…Vol 1 | 1860 | Documents Relating to the 1860s | Book | |
| Reports of explorations and surveys to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean made under the Secretary of War, in 1853-5…Vol 2 | 1860 | Documents Relating to the 1860s | Book | |
| Request to the War Office | ca. 28 October 1785-1795 | The Henry Knox Papers [0162] Undated: The New Nation | Correspondence; Government document | |
| Response to objections to the plans of the Philadelphia General Committee of Defence | ca. September 1814 | Documents relating to the defense of Philadelphia | Military document | |
| Response to objections to the plans of the Philadelphia General Committee of Defence [French] | ca. September 1814 | Documents relating to the defense of Philadelphia | Military document | |
| Return for the corps of sappers and miners at Constitution Island, New York | 26 September 1783 | The Henry Knox Papers [0065] 16-30 September 1783 | Military document | |
| Return of clothing for the Corps of Sappers and Miners | 11 October 1783 | The Henry Knox Papers [0067] 11-20 October 1783 | Military document | |
| Return of four sloops and cargoes sent to West Point | 28 September 1782 | The Henry Knox Papers [0046] September 17822 | Military document | |
| Return of stores wanting in the laboratory at West Point | 30 April 1782 | The Henry Knox Papers [0041] April 1782 | Military document | |
| Revised bill S. 1779. about preservation of forests | 30 January 1888 | Papers of George May Powell | Government document | |
| Rhode Island Council of War resolution of Rhode Island to pay Caleb Harris | 13 November 1777 | Documents Relating to 1777 | Government document; Legal document; Land transaction document | |
| Rhode Island resolution ordering the purchase of land near a gun powder mill | 21 August 1777 | Documents Relating to 1777 | Government document; Legal document; Land transaction document | |
| Richard Harlan to John James Audubon regarding Audubon's work and family | 11 February 1832 | Documents Relating to 1832 | Correspondence | |
| Richard March Hoe to R. H. Gibbons regarding property at 516 Broadway in New York City available for lease | 12 March 1868 | Documents Relating to the 1860s | Correspondence | |
| Robert E. Lee to John MacKay | 7 November 1839 | Documents Relating to 1839 | Correspondence | |
| Robert E. Lee to John MacKay exchanging news and pleasantries | 26 June 1834 | Documents Relating to 1834 | Correspondence | |
| Robert E. Lee to John MacKay, regarding remote posting and improvements on the Mississippi | 27 June 1838 | Documents Relating to 1838 | Correspondence | |
| Robert E. Peary to Clarence C. Buel indicating that he is planning an expedition to Greenland | 11 May 1891 | Documents Relating to the 1890s | Correspondence | |
| Robert Field Stockton to John Ericsson about moving boilers in a ship | 4 March 1843 | Documents Relating to 1843 | Correspondence | |
| Robert Fulton to Charles Stanhope, 3rd Earl Stanhope, regarding canals | 10 April 1798 | Documents Relating to 1798 | Correspondence | |
| Robert Fulton to Charles Stanhope, 3rd Earl Stanhope, regarding canals | 14 April 1798 | Documents Relating to 1798 | Correspondence | |
| Robert Fulton to Charles Stanhope, 3rd Earl Stanhope, regarding the construction of canals | 14 April 1798 | Documents Relating to 1798 | Correspondence | |
| Robert Fulton to Charles W. Peale regarding debt and Fulton's steamboat business | 11 June 1808 | Documents Relating to 1808 | Correspondence | |
| Robert Fulton to Henry Dearborn listing the estimated costs of constructing the first steam-powered U.S. naval vessel | 4 June 1814 | Documents Relating to 1814 | Correspondence | |
| Robert Fulton to Henry Dearborn regarding measuring the velocity of the water in the Mississippi | 13 January 1807 | Documents Relating to 1807 | Correspondence | |
| Robert Fulton to John Livingston discussing their steamboat business | 22 September 1814 | Documents Relating to 1814 | Correspondence; Business and financial document | |
| Robert Fulton to Mr. Philips with remarks on a book | 2 July 1805 | Documents relating to American inventors | Correspondence | |
| Robert Fulton to Oliver Evans encouraging Evans to test his steam engine in competition with Watt's | 30 January 1812 | Documents Relating to 1812 | Correspondence | |
| Robert Fulton to Robert Livingston regarding the Mississippi River | 18 October 1807 | Documents Relating to 1807 | Correspondence | |
| Robert Fulton to Thomas Law discussing business matters | 29 May 1811 | Documents Relating to 1811 | Correspondence | |
| Robert Fulton to unknown discussing a steam boat | 25 January 1807 | The Livingston Family Papers [101] 1807-1809 | Correspondence | |
| Robert R. Livingston to William Constable giving instructions for purchasing a steam engine | 4 November 1798 | Documents Relating to 1798 | Correspondence | |
| Romain Smith to his friend Frank regarding his self training as a telegraph operator | 5 January 1864 | Collection of John F. Weeks, K company, 36th regiment, Illinois, infantry | Correspondence | |
| Rufus Putnam to Henry Knox discussing a survey of the Muscongus patent | 11 December 1787 | The Henry Knox Papers [0082] October-December 1787 | Correspondence | |
| Rule for artillery batteries | ca. 1776-1795 | The Henry Knox Papers [0161] Undated: Revolutionary War | Military document | |
| Rule for ascertaining the longitude by Chro. at Sunset | 1857 | William McBlair collection | Military document | |
| Rutherford Birchard Hayes to Eliakim P. Scammon regarding a Confederate attack and a gun | 12 August 1862 | Unassociated Civil War Documents 1862 | Correspondence | |
| Rutherford Birchard Hayes to Eliakim P. Scammon regarding a mission to destroy the Mercer salt well | 10 August 1862 | Unassociated Civil War Documents 1862 | Correspondence | |
| Rutherford Birchard Hayes to Eliakim P. Scammon regarding an Ohio regiment and military supplies | 11 August 1862 | Unassociated Civil War Documents 1862 | Correspondence | |
| Samuel Colt to Henry C. Deming about sharing a payment | 6 April 1860 | Album of letters to Alfred Burr and Henry Deming | Correspondence | |
| Samuel Colt to Ned Dickerson about the Whittier patent | 18 March 1851 | Documents relating to American inventors | Correspondence; Legal document | |
| Samuel Dana to Joseph B. Varnum introducing inventor William Whittemore | 1 December 1808 | Letters to Varnum regarding military and political matters, the Quasi-War, the War of 1812, and patronage | Correspondence | |
| Samuel F. B. Morse | 1872 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Artwork | |
| Samuel F. B. Morse to Charles Butler regarding his Atlantic cable | 16 August 1866 | Documents Relating to the 1860s | Correspondence | |
| Samuel F. B. Morse to Edward P. Fry complaining about mail he has sent that has failed to reach its destination | 14 March 1870 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Correspondence | |
| Samuel F. B. Morse to Edward P. Fry regarding arrangements for a telegraphic line from Philadelphia to New York | 2 July 1844 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Correspondence; Business and financial document | |
| Samuel F. B. Morse to Edward P. Fry regarding arrangements for a telegraphic line from Philadelphia to New York | 10 July 1844 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Correspondence; Business and financial document | |
| Samuel F. B. Morse to Edward P. Fry regarding the business aspects of the telegraph | 1 January 1869 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Correspondence; Business and financial document | |
| Samuel F. B. Morse to Edward P. Fry regarding improvements made to telegraph machinery | 22 August 1844 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Correspondence; Business and financial document | |
| Samuel F. B. Morse to Edward P. Fry regarding Morse's interest in having the government own the telegraph invention | 11 March 1870 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Correspondence | |
| Samuel F. B. Morse to Edward P. Fry regarding several individuals | July 1844 | Collection of letters of Samuel F. B. Morse to Edward P. Fry concerning the New York - Philadelphia telegraph | Correspondence; Business and financial document | |
| Samuel F. B. Morse to Mrs. M. Stuart sharing his faith in the success of the Atlantic telegraph despite gloomy prospects | 18 August 1865 | Documents Relating to the 1860s | Correspondence | |
| Samuel Finley Bresse Morse to John C. Spencer regarding telegraphic conductors | 15 March 1844 | Documents Relating to 1844 | Correspondence | |
| Samuel Finley Morse to Catherine A. Pattison apologising for his late reply which he blames on being consumed with perfecting his telegraph | 9 July 1837 | Documents Relating to 1837 | Correspondence | |
| Samuel Finley Morse to Catherine A. Pattison regarding his progress with the telegram | 27 August 1837 | Documents Relating to 1837 | Correspondence | |
| Samuel Finley Morse to George Wood regarding ta petition for government aid in constructing an overland international telegraph line. Also mentions the first telegraph message. | 25 June 1864 | Unassociated Civil War Documents 1864 | Correspondence | |
| Samuel Finley Morse to J. F. Frazer regarding Moigno's "Traite de Telegraphic Electrique" | 14 September 1849 | Documents Relating to 1849 | Correspondence | |
| Samuel Finley Morse to John C. Spencer regarding a lead pipe | 19 January 1844 | Documents Relating to 1844 | Correspondence | |
| Samuel Hodgdon to John Bryant regarding the development of an armory | 9 January 1795 | Archive of Captain John Bryant, Deputy Commissary of Military Stores at the Armory in Springfield, Massachusetts | Correspondence | |
| Samuel Morse to E. H. Sanford regarding patent rights for the telegraph in Oregon and California | 12 May 1854 | Documents Relating to 1854 | Correspondence; Business and financial document | |
| Samuel Morse to John Spencer concerning material for telegraph wires | 13 June 1843 | Documents Relating to 1843 | Correspondence; Business and financial document | |
| Samuel Morse's introduction for Mrs. Alfred Vail | 14 June 1871 | Documents Relating to the 1870s | Miscellany | |
| Samuel Phillips to Henry Knox | 22 July 1791 | The Henry Knox Papers [0101] July-August 1791 | Correspondence; Military document | |
| Samuel Pierpont Langley to T.M. Barber discussing editing a paragraph describing an observatory in Allegheny City, Pennsylvania | 15 June 1880 | Documents Relating to the 1880s | Correspondence | |
| Samuel Sumner Wilde to Henry Jackson Knox discussing travel and land surveys | 22 December 1806 | The Henry Knox Papers [0158] July-December 1806 | Correspondence | |
| Samuel Winslow to Henry Knox about bad news and his lime business | 15 April 1786 | The Henry Knox Papers [0077] January-August 1786 | Correspondence; Legal document; Land transaction document | |
| Sarah Humphreys to Joseph Humphreys regarding family matters | ca. 29 March 1840 | Archive of Confederate general & family re: plantation and slaves | Correspondence | |
| Scientific America | 25 January 1862 | Collection of miscellaneous Civil War-era newspapers | Newspapers and Magazines | |
| Sebastian Bauman to Henry Knox about possible war, American engineers and artillery for New York | 13 April 1794 | The Henry Knox Papers [0122] April-June 1794 | Correspondence | |
| "Section and Isometric View of a Gabion." | ca.1863 | Journal and drawings of bombproofs, with collateral | Miscellany; Military document | |
| A short account of the Field Pieces presented by Mr. Anderson Professor of Natural Philosophy, to Mr. La Fayette, and the first National Assembly of France; together with two Extracts referred to in the Memorial to General Washington dated August 20th 1793 | 20 August 1793 | The Henry Knox Papers [0119] July-September 1793 | Military document | |
| Sidney Diamond to Estelle Spero | ca. November 1943 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | ca. June 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | ca. 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 8 February 1943 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 17 June 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 9 February 1943 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 06 July 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 25 July 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | ca. 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 5 December 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 2 September 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | ca. 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 12 June 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 17 June 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | ca. 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 02 July 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | 6 November 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sidney Diamond to Estelle Spero | ca. 1942 | Collection of WWII letters of Sidney Diamond to Estelle Spero | Correspondence | |
| Sir George Steuart Mackenzie to Thomas Pringle about election | 17 July 1818 | Documents Relating to 1818 | Correspondence | |
| Sir John Anderson to Harry S. Truman regarding meeting, atomic energy | 21 December 1945 | Four documents relating to Harry S. Truman | Correspondence | |
| Sketch of land in Hancock County, Maine | October 1804 | The Henry Knox Papers [0154] July-December 1804 | Map | |
| Some remarks on Mr. Ressons observations on the uncertainty in throwing shells & attempts to remedy the defects that occasion this uncertainty | 1777 | The Henry Knox Papers [0018] September-December 1777 | Correspondence; Military document | |
| Special intelligence report on... the Panama Canal during the year 1885 | 1886 | Documents Relating to the 1880s | Book | |
| Statement Showing expenditures on account of the Magnetic Telegraph | 1 January 1844 | Documents Relating to 1844 | Business and financial document | |
| Station house, North Adams, MA | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| Steam locomotives and trains | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| Stephen Long to Richard Harlan thanking Harlan for a present and mentioning survey instructions | 31 March 1837 | Documents concerning American explorers, adventurers and naturalists | Correspondence; Land transaction document | |
| Stereo view of Edison in his laboratory | 1919 | Documents Relating to the 1910s | Photograph | |
| The sweet potato as a flour substitute | circa 1918 | Documents Relating to the 1910s | Broadside | |
| Sylvia Weiner to Morris "Moe" Weiner | 07 August 1945 | The Weiner Collection | Correspondence | |
| Sylvia Weiner to Morris "Moe" Weiner | 09 August 1945 | The Weiner Collection | Correspondence | |
| Sylvia Weiner to Morris "Moe" Weiner | 13 August 1945 | The Weiner Collection | Correspondence | |
| Sylvia Weiner to Morris "Moe" Weiner | 20 August 1943 | The Weiner Collection | Correspondence | |
| T. B. A. David to Eliakim P. Scammon regarding telegraph lines | 25 November 1862 | Collection of Eliakim P. Scammon, 23rd regiment, Ohio, infantry | Correspondence; Military document | |
| Telegram announcing Abraham Lincoln's death | 15 April 1865 | Unassociated Civil War Documents 1865 | Correspondence | |
| Telegram book from the Treasury Department | 1 November 1865 - 31 December 1865 | Documents Relating to the 1860s | Government document | |
| Telegram book from the Treasury Department | 1 June 1865 - 31 July 1865 | Documents Relating to the 1860s | Government document | |
| Telegram message for Samuel Morse's coachman | circa 1850-1859 | Documents Spanning Decades | Correspondence | |
| Telegram to Wheeler McMillan, sent from Edison in Fort Meyers, Florida | 20-Feb-28 | Collection of three items related to Thomas Edison and agriculture | Correspondence | |
| Theodore Canot to Thomas T. Craven about making rigging | 13 September 1844 | Documents Relating to 1844 | Correspondence; Military document | |
| Theodore F. Neafie to his sister regarding his beliefs of a possible revolution against the railroad monopolies | 26 August 1877 | Letters 1st Cal. Regt. Regarding camp life, southerners, McClellan and slavery | Correspondence | |
| Thomas Alva Edison re: phonplex system of telegraphy | 12 August 1886 | Documents Relating to the 1880s | Correspondence | |
| Thomas Alva Edison to Friend Griffin ordering several motors and commenting on his financial situation | 6 June 1893 | Documents Relating to the 1890s | Correspondence | |
| Thomas Alva Edison to James C. Parrish re: raising funds | 3 January 1896 | Documents Relating to the 1890s | Correspondence | |
| Thomas Gilkey to Henry Knox about a surveyor | ca. 1784-1806 | The Henry Knox Papers [0163] Undated: Knox as Landlord | Correspondence | |
| Thomas Goldthwait to Samuel Waldo and Francis Waldo discussing the topography and resources of lots of land | 24 October 1765 | The Henry Knox Papers [0004] 1760-1769 | Correspondence | |
| Thomas Goldthwait to Thomas Flucker about a new town | 30 November 1765 | The Henry Knox Papers [0004] 1760-1769 | Correspondence | |
| Thomas Goldthwait to Thomas Flucker stating that he will go ahead with building a new town | 16 February 1766 | The Henry Knox Papers [0004] 1760-1769 | Correspondence | |
| Thomas Hart Benton to John C. Rivis about a saw mill and a newspaper proprietor | 10 May 1843 | Collection of correspondence of the North Family | Correspondence; Business and financial document | |
| Thomas J Green to James Gadsden Introducing Mr. Robert Rose as a businessman connected with building the Atlantic and Pacific Railroad, of which Gadsden is an advocate | 12 October 1853 | Collection of letters to John Cripps, General Gadsden's Secretary | Correspondence | |
| Thomas J Jackson to John Letcher regarding building a railroad between Strasburg & Winchester | 29 April 1861 | Unassociated Civil War Documents 1861 | Correspondence | |
| Thomas Jefferson to David Gelston regarding thanks for supplying statistics on use of steamboats | 14 November 1811 | Documents Relating to 1811 | Correspondence | |
| Thomas Jefferson to Dr. David Hosack on news of a revolution in Naples | 11 May 1821 | Documents Relating to 1821 | Correspondence; Government document | |
| Thomas Jefferson to Dr. William Bentley thanking him for botanical specimens and illustrations | 29 December 1808 | Documents Relating to 1808 | Correspondence | |
| Thomas Jefferson to Eli Williams, Thomas Moore, and Joseph Kerr regarding Cumberland Road and re-examining its route from Washington | 6 August 1808 | Documents Relating to 1808 | Correspondence; Government document | |
| Thomas Jefferson to Henry Knox on the joys of being a farmer | 1 June 1795 | The Henry Knox Papers [0126] April-June 1795 | Correspondence | |
| Thomas Jefferson to Henry Remsen, Jr. regarding the reconvening of congress | 9 November 1793 | Documents Relating to 1793 | Correspondence; Government document | |
| Thomas Jefferson to the Institut National de France on becoming its first American member | 14 November 1802 | Documents Relating to 1802 | Correspondence | |
| Thomas Jefferson to Isaac Briggs regarding the construction of a beni oil mill | 12 May 1808 | Documents Relating to 1808 | Correspondence | |
| Thomas Jefferson to J. Dorsey regarding progress in manufactures | 21 January 1808 | Documents Relating to 1808 | Correspondence | |
| Thomas Jefferson to James Mease thanking him for his dissertation on canine madness | 31 May 1792 | Documents Relating to 1792 | Correspondence | |
| Thomas Jefferson to James Ronaldson regarding the design of a new typeface | 18 July 1822 | Documents Relating to 1822 | Correspondence | |
| Thomas Jefferson to John Page commenting on England and the hatred its people have for America | 4 May 1786 | Documents Relating to 1786 | Correspondence | |
| Thomas Jefferson to Lewis Brantz discussing a Mr. Haessler | 3 April 1823 | Documents Relating to 1823 | Correspondence | |
| Thomas Jefferson to Patrick K. Rogers regarding the delayed opening of the University of Virginia | 23 June 1819 | Documents Relating to 1819 | Correspondence | |
| Thomas Jefferson to Samuel Huntington regarding the first Patent Act of the United States | 15 April 1790 | Documents Relating to 1790 | Correspondence | |
| Thomas Jefferson to Tristram Dalton about agriculture | 2 May 1817 | Documents Relating to 1817 | Correspondence | |
| Thomas Jefferson to William J. MacNeven regarding Brande's manual of Chemistry | 12 January 1822 | Documents Relating to 1822 | Correspondence | |
| Thomas Jefferson to William S. Cardell commenting on the role of language and his honorary membership of the Academy of Language | 27 January 1821 | Documents Relating to 1821 | Correspondence; Non-governmental organization document | |
| Thomas Jefferson to William Smith with information on courses offered by John Wales Eppes | 28 April 1791 | Letters between Benjamin Franklin and William Smith on Education | Correspondence | |
| Thomas Lincoln to Bela Lincoln [incomplete] | 9 January 1831 | Documents Relating to 1831 | Correspondence | |
| Thomas Russell to Henry Knox on canal construction | 23 January 1793 | The Henry Knox Papers [0117] January-March 1793 | Correspondence; Business and financial document; Government document | |
| Thomas Walley to Henry Knox regarding maps and surveys of the American coast | 20 March 1790 | The Henry Knox Papers [0094] January-March 1790 | Correspondence | |
| Thomas Walley to Henry Knox regarding maps and surveys of the American coast | 1 February 1790 | The Henry Knox Papers [0094] January-March 1790 | Correspondence; Business and financial document | |
| Timothy Pickering to Henry Knox about a travelling forge | 1 November 1783 | The Henry Knox Papers [0069] November 1783 | Correspondence; Military document | |
| To Sir asking who makes the best artificial legs | 5 May 1866 | Papers of George May Powell | Correspondence | |
| To staff members of Columbia University, S.A.M. Laboratories, Division 1 | 31 January 1945 | Collection relating to Irving Kaplan and Francis Bonner on controlling atomic power | Correspondence | |
| Torpedo War, and Submarine Explosions | 1810 | The Livingston Family Papers [102] 1810 | Book | |
| Town meeting minutes from Cumberland, Rhode Island | 6 June 1778 | Documents Relating to 1778 | Government document | |
| Translation of certificate issued by the Royal Icelandic Literary Society | 13 September 1791 | Collection of items pertaining to Doctor John Lorimer | Non-governmental organization document | |
| Travel Diary of George May Powell | March-April 1873 | Papers of George May Powell | Diary | |
| A treatise on field fortification, containing instructions on the methods of laying out, constructing, defending, and attacking intrenchments, with the general outlines also of the arrangement, the attack and defence of permanent fortifications | May 1861 | Unassociated Civil War Documents 1861 | Book | |
| Trolley car with four sets of bench seats | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| Two letters from Joseph Peirce to Henry Knox about Peirce's son and the Waldo patent | 7-8 February 1792 | The Henry Knox Papers [0106] February 1792 | Correspondence | |
| Two R.R. flatbed cars atop bridge over Deerfield River, MA | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| Ulysses S. Grant to David D. Porter, regarding frustrated attempt to dig a canal bypassing Confederate forces | 27 February 1863 | Unassociated Civil War Documents 1863 | Correspondence | |
| Ulysses S. Grant to John A. Dix regarding the Gatling Gun | 7 December 1866 | Unassociated Civil War Documents 1865-1929 | Correspondence | |
| Ulysses S. Grant to Nathan Appleton concerning the Panama Canal project | 7 January 1881 | Documents Relating to the 1880s | Correspondence | |
| Union Pacific Railroad officers at ceremony at Promontory Point [Russell #226] | 10 May 1869 | The Joining of the rails [six albumen photographs of railroad] | Photograph | |
| Unsigned Christmas card | Collection of Richard H. Jackson, I Company, 9th Regiment, New York Infantry | Miscellany | ||
| View from office window looking east [Fitchburg Supply Co. across street] | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| View of Professor Thaddeus Lowe and staff inflating reconnaissance balloon | 1860 | Cartes de visites | Photograph | |
| View of soldiers holding ropes attached to a reconnaissance balloon | 1860 | Cartes de visites | Photograph | |
| View South from office window Fitchburg [shows roundhouse and town] | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| View up Main St. from office window [showing trolley tracks in street] | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| Views of the American West [album of 50 prints, including railroads, etc.] | ca. 1868 | Documents Relating to the 1860s | Photograph | |
| Views of coaling trestle, East Fitchburg | ca. 1893 | Collection of 42 cyanotype photographs of the Fitchburg, Massachusetts Railroad | Photograph | |
| W Kingman to John G. Walker with dates when the ship "Victoria" can be placed at his disposal for the transport of the canal commissioners "to points on the Lake" | 23 January 1899 | John Grimes Walker's naval correspondence | Correspondence | |
| Walter Livingston to Johnston Livingston re: description of a spectacular gas experiment | 18 November 1834 | The Livingston Family Papers [108] 1831-1835 | Correspondence | |
| Ward & Briggs to Condell Life Like Limb Company about making artificial limbs | 13 November 1866 | Papers of George May Powell | Correspondence; Business and financial document | |
| Warren G. Harding to O. S. Rapp about restoring the railways | 22 March 1921 | Documents Relating to the 1920s | Correspondence | |
| Weekly return for the corps of Sappers and Miners | 3 October 1783 | The Henry Knox Papers [0066] 1-10 October 1783 | Military document | |
| Wilbur Wright to Hart O. Berg regarding the 1910 International Air Meet | 16 November 1910 | Documents Relating to the 1910s | Correspondence | |
| Wilbur Wright to Hart O. Berg regarding air craft engines | 4 March 1910 | Documents Relating to the 1910s | Correspondence | |
| Wild life conservation in theory and practice; lectures delivered before the Forest School of Yale University, 1914, by William T. Hornaday, Sc.D. ... | 1914 | Documents Relating to the 1910s | Book | |
| William A. Allison to Stockton Bates regarding his discharge from the army | 18 June 1865 | Collection of William A. Allison | Correspondence | |
| William Bachellor to Captain Hudson discussing the chemistry of salt and its medical applications | 14 July 1777 | Documents Relating to 1777 | Correspondence | |
| William Bainbridge to Amos Binny on the design of the USS Constitution and USS United States | 3 June 1802 | Documents Relating to 1802 | Correspondence; Military document | |
| William E. Mitchell to L. D. Gardner | 26 April 1921 | Documents Relating to the 1920s | Correspondence | |
| William Gordon to Henry Knox discussing the manufacture of gun powder | 21 March 1785 | The Henry Knox Papers [0074] January-April 1785 | Military document; Correspondence | |
| William Henry Harrison to B. Tappin regarding the construction of his distillery | 9 July 1826 | Documents Relating to 1826 | Correspondence | |
| William Hull to Henry Knox about building a canal and recent military losses | 20 December 1791 | The Henry Knox Papers [0103] November-December 1791 | Correspondence; Military document | |
| William Maunsell to John Maunsell about potato cultivation and his coming meetings with King George and the Prince of Wales | 19 March 1794 | The Henry Knox Papers [0121] January-March 1794 | Correspondence | |
| William Pearce to Tobias Lear regarding an invite to George and Martha Washington to see the demonstration of his machinery | 11 May 1792 | Tobias Lear papers | Correspondence | |
| William T. Sherman commenting on a letter written by James Buchanan Eads | 27 January 1875 | Documents Relating to the 1870s | Correspondence | |
| William Thomas Morton to Josiah Sutherland about patent information | 25 July 1854 | Documents relating to American inventors | Correspondence | |
| Winfield Scott to James W. Abert about increasing the corps of topographical engineers | 20 April 1838 | Documents Relating to 1838 | Correspondence; Military document | |
| Winthrop Sargent to Henry Knox on military experiments and appointments | 1 June 1792 | The Henry Knox Papers [0110] June 1792 | Correspondence; Military document | |
| Witter H. Johnston to Miss Dora Johnston about studying military science and the formation of a new company | 19 October 1861 | Letters from Witter H. Johnston | Correspondence | |
| Write up of an interview with Thomas Edison on agriculture and rubber production | ca. 1928 | Collection of three items related to Thomas Edison and agriculture | Miscellany |
