Hyman-Fire-Piston-Cochranes-Of-Oxford-0107-P-The-Hyman-Fire-Piston-is-an-informative-piece-of-kit-that-demonstrates-the-rise-in-temperature-that-is-produced-when-a-fixed-mass-of-gas-is-compressed-In-this-apparatus-the-contained-air-is-compressed-by-a-hand-operated-piston-The-heat-generated-is-sufficient-to-ignite-a-small-quantity-of-tinder-supported-inside-the-transparent-cylinder-Suitable-tinder-is-included-but-almost-any-organic-material-will-work-if-dry-enough-i-e-cotton-charcoal-