Josef Adam Braun

Josef Adam Brown ( Russian Иосиф Адам Браун * 1712 in Asch , † September 22 ^{. Jul} / 3. October  1768 ^greg. In St. Petersburg ) was a German- Russian physicist and university teacher .

Life

Braun came to St. Petersburg and in 1746 became a member of the St. Petersburg Academy of Sciences . In 1748 he became professor of philosophy at the Academy-University of the St. Petersburg Academy of Sciences. He was the first to reach the low temperature of −42  ° C in the laboratory , so that he and Mikhail Lomonossow could determine the freezing point of mercury while studying the properties of mercury . Thereupon he examined in particular the deformation behavior of the solid mercury. It reached temperatures of -65 ° C.

Braun also worked in the field of meteorology and philosophy. He developed his own theory of gravity .

Braun was married to Georg Wilhelm Richmann's widow.

Individual evidence

1. ↑ ^{a b c} БРАУН Иосиф-Адам (Braun Josef Adam) (accessed November 4, 2017).
2. ↑ ^{a b} Браун Иосиф-Адам . In: Brockhaus-Efron . IVa, 1891, p. 615 ( Wikisource [accessed November 4, 2017]).
3. ↑ RAN: Браун Иосиф Адам (accessed November 4, 2017).
4. ↑ De Admirando frigore artificiali, mercurius quo est congelatus . 1760 ( Wikisource [accessed November 4, 2017]).
5. ↑ De insigni viribus Telluris mutationibus . 1756 ( Wikisource [accessed November 4, 2017]).
6. ↑ De atmospherae mutationibus praecipuis earumque praesagiis . 1759 ( Wikisource [accessed November 4, 2017]).