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American Philosophical Society
1769 Transit of Venus: American Philosophical Society Essays Written By David Rittenhouse and John Ewing
David Rittenhouse & John Ewing
The Transit of Venus is a celestial event that occurs when Venus’s orbit causes the planet to speed past the slower moving Earth and visibly cross the Sun, partially obscuring it. The Transits of Venus occur in pairs that are eight years part and tend to be separated in time by just over a century. The first person to predict and observe the Transit of Venus was James Horrocks, on Dec. 4, 1639. There were also Transits of Venus observed and recorded in 1761, 1769, 874 and 1882. The 2012 Transit of Venus will be visible in the Americas on the evening of June 5, 2012. The next transit does not occur until 2117. This vol. contains observations of the Transit of Venus on June 3, 1769, recorded by David Rittenhouse, who observed the transit in Norriton, PA; and John Ewing, who observed the Transit of Venus on June 3 and the Transit of Mercury on Nov. 9, 1769, in the State-House Square, Philadelphia. Illus
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Alhacen on Image-Formation and Distortion in Mirrors: Volume One: Introduction and Latin Text (Transactions 98, Part 1, Volume 1)
The Ground Sloth: “Megalonyx”: (Xenarthra: Megalonychidae) from the Pleistocene (Late Irvingtonian) Camelot Local Fauna, Dorchester County, SC: Trans., APS (vol. 100, Pt. 4)
Stationer’s Voice: The English Almanac Trade in the Early Eighteenth Century (Transaction 95-4)
Long Route to the Invention of the Telescope: (Transactions 98-5)
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