Papin's digester
Inventory Number:
THE09 Based on Boyle's law (the volume of a body of an ideal gas is inversely proportional to its pressure) Denis Papin (Papin's statute at the CNAM, Paris1647 - c. 1712) built a bone digester which is a closed vessel with a tightly fitting lid that confines steam until a high pressure is generated. A steam release valve keeps the machine from exploding. The steam machine results from this principle.
http://en.wikipedia.org/wiki/Steam_digester

