Foucault LeonABAA
3 résultats
1869133625Paris France: L'Académie des Sciences 1869. unbound edges uncut in later portfolio. Science. 4to. unbound edges uncut in later portfolio. 6 pages. Text in French. Extracted from Comptes rendus des séances de L'Académie des Sciences LXIX December 13 1869. The siderostat is a revolving flat mirror designed to enhance telescopic viewing. Foxing. Unopened. L'Académie des Sciences unknown books
185408799Paris: Victor Masson 1854. Quarter Leather. Very Good. Octavo. Offered is a very good entire Vol. 41 of Annales de Chimie et de Physique in nice quarter brown leather binding and marbled paper covered boards with raised bands spine gilt lettering on black leather spine label. Light rubbing cover edges scattered foxing. Complete with the foldout plate demonstrating Foucault's apparatus diagramatically reproduced in DSB VOl. 5 p. 85. A Comparison of this velocity in air and in water would be clear experimental test between the wave and particle theories of light since the former required light to travel faster in air; the later; in water.Fizeau returned to the rotating mirror to compare light's velocity in rare and dense media but here he was beaten by Foucault who announced on 30 April 1850 that "light travels faster in air than in water" Foucault's first experiment carried out in 1850 and written up in full in his doctorial thesis of 1853; was purely comparative; he announced no numerical values until 1862. DSB Vol. 5 pp. 85-85. <br/><br/> Victor Masson hardcover books
1855287442Paris 1855. unbound. very good. Uncommon A.L.S. "L. Foucault" 8vo. 1 page Paris February 24th 1855 to Monsieur Ami Gilbert Govi in French translated: "Here is my take on the size one has to give the drawing; you could make it even smaller but certainly not any larger. As you know the engraver is more than willing to engrave on your marks so I rely on your extreme kindness. All yours and leaving things in your camp I remain." Two very minor striations at the top left-hand margin otherwise in fine condition.<br/><br/> French physicist who invented the Foucault Pendulum made an early measurement of the speed of light discovered eddy currents and is credited with naming the gyroscope.<br/><br/> unknown books
