MECHANISM OF NATURE 



displacement of Primary Spheres in actual contact 

 throughout the whole distance. And the force 

 light is transmitted as displacement, and so is heat 

 and magnetism and gravity. Yet none of these is 

 alike, for the body that transmits and the body 

 that receives are both capable of many changes. 



Then light waves and heat waves are not differ- 

 ent in intrinsic velocity, for the rapidity of the 

 transmission depends on the yielding of the receiv- 

 ing body, just as much as on the pressure of the 

 transmitting body. And the void matter affecting 

 the illumination of a body does not that instant 

 come from the source of light, for it was already 

 in close proximity to the receiving body. Then is 

 the transmission of light subject to the laws that 

 govern the hydraulic jack, and laws that apply to 

 spheres in full boxes are applicable to Primary 

 Spheres in the transmission of light. 



PROPOSITION XXII. 



Incandescence is an abnormal hastening of the 

 process of life, in the atoms composing the 

 surface of the glowing body. 



The white hot iron gives off light; the hot coal 

 glows while the heat lasts, and the carbon of our 

 glow lamp is not consumed. A stove may be red 

 hot many times and yet lose little of its weight, 

 and none because of the glowing. 



It is then evident that the heat produces the 

 light, and any loss of substance by the red hot 

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