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Hermann von Helmholtz - But heat can also be produced...
But heat can also be produced by the friction of liquids, in which there could be no question of changes in structure, or of the liberation of latent heat. (Hermann von Helmholtz)

But heat can also be produced by the friction of liquids, in which there could be no question of changes in structure, or of the liberation of latent heat.

Hermann von Helmholtz

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heat latent liberation question structure friction

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