80 ONTOLOGY. 



c. HEAT. 



385. While the aether falls into a state of tension or 

 shines, it is thrown into motion. This motion of aether 

 manifests itself as the conatus or effort to extension. 

 The extension, however, considered as a world-phenome- 

 non, is Heat. 



386. Light, when it operates upon terrestrial matter, 

 excites this to special polarization, whereby the ^Etherial 

 that is in it is set in motion, i. e. heat is generated. 



387. Light never moves directly the mass itself, but 

 only the JEtherial that is in it. Through this motion of 

 the aether it becomes separated from matter ; and this 

 separation is manifested as free heat. 



388. Heat is not matter itself any more than light is, 

 but it is only the act of motion in the primary matter. 

 In heat, as well as in light, there certainly resides a 

 material substratum ; yet this substratum does not give 

 out heat and light ; but the motion only of the substra- 

 tum gives out heat, and the tension only of the substratum 

 light. There is no body of heat ; nitrogen is the body of 

 heat, just as oxygen may be called the body of fire. 



389. Heat is real space ; into it all forms have been 

 resolved, as all materiality has been resolved into gravity, 

 and all activity, all polarity into light. Heat is the uni- 

 versal form, consequently the want of form. 



390. Light properly develops heat out of matter 

 through separation of the fixed poles from the substance, 

 whereby the latter again passes over into aether. 



391. The development of heat in a body is not an 

 extrusion of a matter adherent, and as it were foreign, to 

 it ; but an ascent of the matter itself into heat. The 

 matter does not develop, or give out heat, but becomes 

 heat, namely aether. 



392. The loss which a body sustains by the radiation 

 of heat is as slight as the aether is subtile or rare ; thus 

 it is infinitely small, where the aether is infinitely light. 

 We cannot speak of the loss of matter, while it is hot ; 

 although a true loss is present, if the point in question 



