| 10 | Creator: | Mulhern, Edward, d.1833? | Requires cookie* | | | Title: | Dissertation on the doctrine and principles of magnetism
| | | | Dates: | 1829 | | | | Abstract: | During the late eighteenth and early nineteenth centuries, the American Philosophical Society regularly received letters, and occasionally full blown manuscripts, from members of the public regarding their ideas on science or technology. In 1829, Edward Mulhern of Philadelphia submitted a manuscript on terrestrial magnetism that he felt had implications for navigation. Little is known about Mulhern other than that he died before 1833.
Mulhern's "Dissertation on the doctrine and principles of magnetism &" is an attempt to work through some fundamental issues in terrestrial magnetism, including the relative orientation and positions of the geographic and magnetic poles, with an eye toward their impact on navigation. The APS Minutes for April 15, 1833, read: "An application from Alex Mulhern to have returned to him a paper on the 'doctrine of Magnetism' laid before the society by his deceased father, was received and the Librarian was directed to return the same.'" | | | | Call #: | Mss.538.M91 | | | | Extent: | 0.1 Linear feet | | | | Sections: |
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| | | | Subjects: | Dissertations | Educational Material | Geodesy | Geomagnetism | Manuscript Essays | Mulhern, Edward, d.1833? | Science and Technology | Sketches. | |
| 16 | Creator: | Poyntell, William,1756-1811. | Requires cookie* | | | Title: | Thermometrical journal, 1803
| | | | Dates: | 1803 | | | | Abstract: | This journal was kept on a voyage from the Downs to the Capes of Delaware on board the ship Three Sisters, 26 June-20 August, 1803. The volume includes "Observations on the storm glass," made on the same voyage. The storm glass, with an explanation of its use, and the journal of observations are at the American Philosophical Society. | | | | Call #: | Mss.551.5.P86 | | | | Extent: | 1.0 Volume(s) | | | | Sections: |
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| | | | Subjects: | Meteorological Data | Meteorological records. | Meteorology. | Poyntell, William,1756-1811. | Science and Technology | Scientific Data | Temperature measurements. | |
| 17 | Creator: | Latrobe, Benjamin Henry, 1764-1820 | Requires cookie* | | | Title: | Opinion On A Project For Removing the Obstructions To A Ship Navigation To Georgetown, Col.
| | | | Dates: | 1812 | | | | Abstract: | Bound with this is: Union Canal Company. Report of the President and Managers to the stockholders ... 1813-1814 -- New York. Citizens. Memorial ... in favor of a canal navigation ... -- New Jersey. Legislature. Report of the Commissioners ... for ... a canal ... -- New York (State). Legislature. Report ... on the subject of the canals, from Lake Erie to the Hudson River ... -- New York (State). Canal Commissioners. Report ... on the canals from Lake Erie to the Hudson River ... -- Granger, Gideon. Speech ... on the subject of a canal from Lake Erie to Hudson's River ... -- New York (State). Laws of the state of New York, respecting navigable communications ... -- Considerations on the Great Western Canal ... -- Say, Jean Baptiste. Des Canaux de navigation ... -- Stevens, John. Documents tending to prove the superior advantages of rail-ways ... -- Annesley, William. A description of [his] new system of naval architecture ... | | | | Call #: | Mss.626.L35o | | | | Extent: | 1.0 Volume(s) | | | | Sections: |
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| | | | Subjects: | Engineering | International Trade. | Latrobe, Benjamin Henry, 1764-1820 | Potomac River. | Printed Material | Science and Technology | Trade | |
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