Resources in Early American History
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 Author:  Henry, Joseph, 1797-1878Requires cookie*
 Title:  Joseph Henry letters, 1836-1878     
 Dates:  1836-1878 
 Abstract:  This small collection contains an assortment of Joseph Henry correspondence, mostly from prominent Americans writing to Henry. Most of the early letters are relatively short notes, with longer, more detailed letters beginning in the correspondence from the 1850s. The most prominent topics of discussion are the Smithsonian Institution, the establishment of Colorado as a territory, and Humboldt's work. Among the prominent correspondents are Robert Hare, Louis Aggasiz, and Alexander Dallas Bache. Two letters are addressed to Mrs. Henry.

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 Call #:  Mss.B.H39p 
 Extent:  47 item(s) 
 Topics:  Colony and State Specific History | Science and technology 
 Genre:  General Correspondence 
 Subjects:  Natural history. | Physics. 
 Author:  unknownRequires cookie*
 Title:  Robert M. (Robert Maskell) Patterson papers, 1775-1853     
 Dates:  1775-1853 
 Abstract:  The Robert Patterson Collection contains a range of documents that touch on many different topics, although most have to do with science and engineering. The earliest documents relate to the Leiper Canal, including Rittenhouse's appraisal of it, and official documents relating to its creation. The largest portion of the documents is scientific correspondence to Robert Patterson, a member of the American Philosophical Society. Much of this correspondence is done under the cover of official APS business. Of particular note are a series of letters relating to nautical calculations that include complex equations used to determine longitude and latitude for nautical almanacs. There are also various lecture notes on natural philosophy, death, mathematics, engineering, and other subjects.

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 Call #:  Mss.B.P274 
 Extent:  0.5 Linear Feet 
 Topics:  Americans Abroad | Early National Politics | Education | Military History | Native America | Science and technology | War of 1812 
 Genre:  Educational Material | General Correspondence | Institutional Records | Notebooks | Political Correspondence | Travel Narratives and Journals 
 Subjects:  Algebra. | Annuities. | Astronomy. | Canals. | Clocks and watches. | Coal. | Electricity. | Magnetism. | Mathematics. | Meteorology -- Observations. | Navigation (Astronautics) | Optics. | Physics. | Quarries and quarrying -- Pennsylvania. | Sound. | Time clocks.