This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Clausius. Rudolf Clausius mcs standrews ac uk html Original uploader was user Sadi Carnot at org en PDold original upload log All user names refer to en July CEST user Sadi Carnot Kbytes no Rudolf Clausius births deaths
Page 2023 Free-images.com. All images are Public Domain