IDENTICAL CHANGES 



cannot be a manifestation of force. (Prop. VI, 

 B. 3.) 



Therefore, this manifestation of force known to 

 us as heat, and whose main feature is a movement 

 of ether particles from a cooling body into the 

 interstices of a body being heated, this cannot be 

 going on at the centre of the earth; therefore, the 

 centre of the earth is devoid of any movement of 

 particles caused by heat; the temperature is abso- 

 lute zero. 



If a shaft could be constructed from the outer- 

 most confines of the Atmosphere to the Centre of 

 the earth and the rarified air brought as it is, to the 

 centre of the earth, then there would undoubtedly 

 be a great display of heat. Always a manifesta- 

 tion of heat requires an inequality ; when two 

 things are equally hot there will then be no mani- 

 festation of heat between them. So if it can be 

 proven that all things on earth are getting to be 

 more and more equalized in temperature, then heat 

 is getting less on earth, for heat is the manifestation 

 of heat. 



Yet inequality of density is not necessarily in- 

 equality of temperature between relative sub- 

 stances, and this is very hard to reconcile with the 

 theory that heat is the result of a universal tension 

 equalizing a difference in density. But a hundred- 

 fold harder it is to reconcile this with the accepted 

 vibration theory of heat. 



A thread of glass may be drawn out so fine that 

 a naked eye may scarcely perceive it. And yet it 

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