In thermodynamics, Heinrich Hertz (1857-1894) was a German physicist, one of the pioneers of radiation thermodynamics, notable for having given a mechanical derivation of the second law of thermodynamics; a derivation, however, that was considered invalid by German mathematician Ernst Zermelo. [1]

References
1. Jungnickel, Christa and McCormmach, Russell. (1990). Intellectual Mastery of Nature: Theoretical Physics from Ohm to Einstein, Volume 2: the Now Mighty Theoretical Physics, 1870 to 1925 (pg. 214). University of Chicago Press.

External links
● Heinrich Hertz – Wikipedia.