How was "Caloric Theory" disproven?

Answer 1

One of the biggest nails in the coffin was an experiment done by Count Rumford. He rotated a bore against the inside of a cannon for hours and hours, producing a huge amount of heat. He came to the conclusion that you could go on producing heat indefinitely as long as you could keep the bore spinning; therefore, the heat was not really a "substance" contained in the metal, as the caloric theory predicted (because if it WERE a substance, you should run out of it eventually; and the experiment showed that it didn't "run out").

Answer 2

Caloric Theory

Answer 3

Using the scientific method