Phlogiston

[Sarah]

The hypothetical principle of fire, or inflammability, regardedby Stahl as a chemical element.

[Sarah]

A mytical substance given off by fire during burning. Said to be the cause of rust. Theoretically a flame stops burning in an enclosed area because the air has become phlogiston

[Sarah]

A widely-researched phenomenon in the Middle Ages, phlogiston was thought to be an inherent substance in all things that could burn. When something was burned, phlogiston was visible in the form of flame, and was released into the air. In turn, people thought something would not burn without air because the air was already full

[Sarah]

Hot semen.