Gustave-Adolphe Hirn

Gustav -Adolf brain ( born August 21, 1815 in Logelbach at Colmar in Alsace, † January 14, 1890 in Colmar) was a French physicist.

Brain occurred in 1834 initially as a color chemist in a calico factory in Logelbach and remained the same as an engineer, after it had been in 1842 converted into a cotton spinning and weaving. Here he began his fundamental studies of the mechanical equivalent of heat.

He delivered numerous papers on the thermodynamics, the theory of the steam engine, the fans and Amslerschen planimeter, Frictional resistance, on the theory of overheating, heat capacity of water; He also invented a Pandynamometer.

The end of 1880 he founded a meteorological observatory at Colmar, where he continued his scientific work. 1894 a monument (see figure) it was built there.

Works

• L' équivalent mécanique de la chaleur, Kolmar and Paris, 1858
• Théorie mécanique de la chaleur, das., 1861, 2 vols; 3rd edition, Paris 1875 (Translation of Zeuners » Broad mechanical theory of heat ," das. 1861, 3rd edition 1875)
• Analysis de l' univers, das., 1868
• Mémoire sur les anneaux de Saturne, Strasbourg, 1872
• Les pandynamomètres, Paris, 1876