Interestingly, Lavoisier proposed that heat is a fluid that flows from hot to cold. Thus, the caloric theory is reminiscent of the phlogiston theory. It is another example of a fruitful yet outdated concept.
The German chemist, Georg Ernst Stahl, who originated the Phlogiston Theory, was born 21 October 1660 #histsci #histchem thonyc.wordpress.com/2015/10/23/t...