French dilatometer, late 18th century with decimal scale added in 19th century French dilatometer 1800-1899
Dilatometer used for the thermal analysis of metals and other materials. Made by Ernst Leitz GMBH Wetzler, Germany, c. 1930. Dilatometer used for the thermal analysis of metals and other materials. Made by Ernst Leitz GMBH Wetzler Late 1930s