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American Philosophical Society
Long Route to the Invention of the Telescope: (Transactions 98-5)
After the telescope became known in 1608-1609, a number of people in widely separate locations claimed that they had such a device long before the announcement came from The Hague; in the summer of 1608, no one had a telescope, in the summer of 1609, everyone had one. For a number of years author Rolf Willach has quietly tested early spectacle lenses in museums and private collections, and now he reports on this study, which gives an entirely new explanation of the invention of the telescope and solves the conundrum mentioned above. Willach is an optical engineer and independent scholar who worked for several years in the Department of Physics at the Institute of Astronomy in Bern. He has written extensively on the history of the development of optics and the telescope. Illus.
Alexander the Great: Coinage, Finances, and Policy (Memoirs Vol. 261)
Sophie de Grouchy Letters on Sympathy (1798): A Critical Edition (Transactions Vol. 98, Part 4)
Treason on Trial in Revolutionary Pennsylvania: APS Transactions Vol. 101 #2
Vergilius Redivivus: Studies in Joseph Addison's Latin Poetry (Transaction 95-2)
Peter Collinson and the Eighteenth-Century Natural History Exchange (Memoir 264)
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