CHAPTER IV 



INFRA-WORLD MECHANICS AND PHYSICS 



1. THE physical aspect of the universe is governed 

 by four quantities, four " elements " of a much more 

 fundamental character than earth, air, fire, and 

 water. These four quantities are length, time, 

 mass, and electricity. None of these can be com- 

 pletely expressed by any combination of the other 

 three. 



The conceptions of extension, space, length, area, 

 volume are abstractions of our own mind, which 

 express and embody the fundamental fact of plurality 

 or coexistence. There would be no need for " space " 

 if I were the only sentient being, and had only one 

 sensation at a time. I should then be quite in- 

 capable of arriving at the conception of space. 

 There would be nothing to suggest it. But the 

 simultaneous existence of beings and objects which 

 are independent of my will leads me to form in- 

 stinctively the idea of space. 



As space implies coexistence, so time implies 

 change. The measurement of time implies two 

 simultaneous changes, one of which occurs at 

 regular intervals i.e., intervals which are accom- 



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