not!! heat stuff: A scientific letter of the 19. century:
Blacksmith uses a hammer to form metal; the metal gets warm; the heat stuff flows from the hand into the metal; as a consequence the hand and the head of the blacksmith become cold!
have been a company secret of James Watt for several years.
Thus he had a monopoly for good heat transforming machines.
© J. Carstensen (Stat. Meth.)