AND ITS SELF-CONSERVATION. 87 



So that, formally, the intensive phase of quantity must be 

 completely set aside in precisely the same measure that the 

 extensive phase is brought into prominence. 



But "set aside" may also mean, "held in abeyance," 

 rendered latent or potential. It is evident, for example, 

 that the matter of a nebula is, in the first place, quantita- 

 tively extensive ; and yet the quantity will not be dimin- 

 ished by its development of the intensive phase through 

 condensation into a planetary system, with the resultant 

 unfolding of chemical elements, followed by the appear- 

 ance of the whole vast order of compounds in vegetal 

 and animal organisms. 



Doubtless through this development (which is also an 

 envelopment) there will be a differentiation of tendency 

 toward the merely extensive phase of quantity in the sub- 

 stance through the radiation of the most diffusible phases 

 of the substance into space as the concentrative process 

 goes on. But also in this concentrative process the ten- 

 dency toward diffusion, toward mere extensive quantity, 

 still remains as a necessary factor in every stage of the 

 condensation. For while the latter is the process in which 

 the intensive phase of quantity is realized, there is also 

 necessarily involved in this the development of the ten- 

 dency toward expansion, toward diffusion, toward the 

 extensive aspect of quantity. Or, in the more concrete 

 terms of physical science, pressure toward a common 

 center must inevitably develop its complement, heat, 

 which is pressure away from the common center. * 



* Professor Helmholz's calculation showing that the continued high tem- 

 perature of the sun is fully accounted for by its continued concentration 

 upon its own center will doubtless occur to the reader as verifying what is 

 said in the text. 



