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Updated: May 1, 2025
But if reflected sunshine, it was objected, the chief at least of the dark Fraunhofer lines should be visible in it, as they are visible in moonbeams, sky illumination, and all other sun-derived light. The objection was well founded, but was prematurely urged, as we shall see.
The sun-derived energy of motion latent in the food we eat is variously transformed within the organism, until some of it appears as the motion of the molecules of a little globule of nerve-matter in the brain. In a rough way we might thus say that the chemical energy of the food indirectly produces the motion of these little nerve-molecules.
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