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Title: Codex O
Identifier(s): text:327970
Subject: Lewis, Meriwether, 1774-1809; Clark, William, 1770-1838; Lewis and Clark Expedition (1804-1806); Astronomy--Observations
Date: 1804-1806

Title: Symposium: Discoveries in Astronomy. Part II: Galileo’s Astonishing Discoveries
Identifier(s): video:999; 2009_11_004
Description: Dr. Gingerich discusses the first use of the telescope for astronomy by Galileo.
Subject: History of Science; Astronomy, History; Telescopes, History; Galilei, Galileo, 1564-1642; APS Meeting Videos
Date: 2009-11-12

Title: De System Copernicia.
Identifier(s): graphics:3141; APSdigobj3372
Description: Graphic representation of the Copernican astronomical model, showing the Earth's path around the sun.; Page 76
Creator: Evans, David, 1681-1751
Source: Aliquot rudimenta philosophiae sive pauca introductoria compendia, technologiae, logicae, rhetoricae et physicae (Mss.509.Ev5); http://amphilsoc.org/mole/view?docId=ead/Mss.509.Ev5-ead.xml
Subject: Math & Physics ; Physics--Early work to 1800; Astronomy--Early works to 1800; Copernicus, Nicolaus, 1473-1543
Date: 1747

Title: William Lambert to Thomas Jefferson, July 16, 1812.
Identifier(s): APSimg7913; APSimg7913
Creator: Lambert, William, 1772-1824
Source: American Philosophical Society Archives (APS.Archives);
Subject: Early American history; Lambert, William, 1772-1824; Jefferson, Thomas, 1743-1826; American Philosophical Society; Astronomy; Astronomical observatories
Date: 1812 July 16

Title: To the public. ...Conditions...upon which said annual [Magellanic] premiums will be awarded. ...Published by order of the society, at Philadelphia, the 19th day of November, 1786
Identifier(s): text:994; APSimg6748; Goodman Number: 10
Description: Signed in type by James Hutchinson, Robert Patterson, Samuel Magaw, and John Foulke, secretaries of the American Philosophical Society. Originally enclosed in letter from Samuel Vaughan to [Jean] Hermann, professor of medicine at the University of Strasbourg, March 20, 1788. The Magellanic premium was begun in 1786 with a 200-guinea donation from John Hyacinth Magellan, a Portuguese member of the Royal Society, and was awarded periodically to "the author of the best discovery, or most useful improvement relating to navigation, astronomy or natural philosophy, mere natural history only excepted."; Located in folder: 1788 March 20. Samuel Vaughan to Professor Hermann.
Creator: American Philosophical Society
Source: Miscellaneous Manuscripts Collection (Mss.Ms.Coll.200);
Subject: Broadsides ; Broadside Class: Science; Broadside Division: Institutions; Broadside Subdivision: Societies; American Philosophical Society; Awards; Astronomy; Navigation; Physics
Date: 1786

Title: An extract from a letter of the Rev. Mr. John Hellins, formerly assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. Dated Potter's Pury, near Stoney Stratford, in Buckinghamshire, Sept. 25, 1792.
Identifier(s): text:1773; APSimg6440; Goodman Number: 117; 973 C683 No. 114
Description: Printed copy of a letter written on behalf of Dr. Maskelyne by his former assistant, John Hellins, in reply to a pamphlet authored by Mr. [Thomas] Mudge. Mudge submitted a chronometer of his own construction for a prize offered by the British Parliament for the determination of longitude at sea. During testing at the Royal Observatory the watch stopped working, leading to claims by Mudge that his device had been improperly handled by the observatory's director, Dr. [Nevil] Maskelyne. In the letter, Hellins details his observation of Maskelyne's great care in moving and winding chronometers.
Creator: Hellins, John, d. 1827
Source: Broadsides Collection (973 C683);
Subject: Broadsides ; Broadside Class: Science; Broadside Division: Physical Science; Broadside Subdivision: Astronomy; Clocks & watches; Longitude; Maskelyne, Nevil, 1732-1811
Date: 1792