Jean Thiébault Silbermann
BiographyIt made its beginnings as preparer of the courses of physique with the Conservatoire national of arts and trades (CNAM) of 1835 to 1848, with Pouillet, like with the Sorbonne of 1839 to 1848. Conservative of the collections of the Academy of arts and trades (1848), it has with Favre, carried out the first measurements of Thermochimie, in connection with heats of combustion of organic compounds (1850 to 1855). Both also measured the release of Chaleur produces by the Electric current, thus confirming the principle of equivalence. One also owes in Silbermann a focometer, for the measurement of the distances Focale S of the lenses, a Héliostat (1843), a Réfractomètre (named " apparatus of Silbermann"), as well as a Pyrometer.
It was one of the founding members of the French company of photography in 1854 and was named knight of the Légion of honor in 1856.
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