a] into [beta], of [beta] into [gamma]. If we should consider the amount of transfer motion instead of the kind of motion, we should have to say that the [alpha] energy had been transformed into [beta] and the [beta] into [gamma].
[Illustration: FIG. 1.]
[Illustration: FIG. 2.]
What a given amount of energy will do depends only upon its form, that is, the kind of motion that embodies it.
The energy spent upon a stone thrown into the air, giving it translatory motion, would, if spent upon a tuning fork, make it sound, but not move it from its place; while if spent upon a top, would enable the latter to stand upon its point as easily as a person stands on his two feet, and to do other surprising things, which otherwise it could not do. One can, without difficulty, form a mechanical conception of the whole series without assuming imponderables, or fluids or forces. Mechanical motion only, by pressure, has been transferred in certain directions at certain rates. Suppose now th
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