Ideas on the Affirmative Principle of Life and the Negative Principle of Death

of heat that can be developed from the body.

3. In every heat phenomenon, the light-acid original: "Lichtsäure." A theoretical acidic component of light common in late 18th-century chemical philosophy. within a body is set in motion, which then acts upon the fatty acid original: "Fettsäure." Here, a speculative combustible substance associated with carbon and heat production. and generates heat.

4. Heat is a phenomenon that lasts only as long as the stimulating light-acid acts upon the excitable fatty acid.

5. In every generation of heat, fatty acid—or caloric caloric original: "Wärmestoff," the historical concept of heat as a physical fluid or substance.—is released, and light-acid—or the light-stimulus original: "Lichtreiz."—is fixed and transformed into light-matter original: "Lichtstoff.".

6. Where heat arises, the light-matter is concentrated in the interior, and the fatty acid is expanded at the periphery.

7. Where light arises, the light-acid is concentrated in the interior, and the soapy essence original: "Saifenartige." A refined, oily substance believed to mediate between different states of matter. is expanded at the periphery.