Solution of the Problem.

Sun-heat, therefore, like sunlight and gravity, is a veritable production, yet it is not due to the process of combustion. It is not dependent for its creation upon the destruction of fabulous quantities of substantial materials. The rather does it originate in, and is it disseminated through the vast energies of spheres retro-acting upon spheres throughout the whole universe of matter.

[6] [Appendix, p. 99.]

[7] [Appendix, p. 100.]

[8] [Appendix, p. 100.]

[9] [Appendix, p. 101.]

[10] [Appendix, p. 102.]

[C] In the motions of the spheres through space, unlike all other forms of motion, there is no element of resistance. This form of motion is therefore incapable of developing vis viva.

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