CHAPTER XVIII. 



MOLECULAB MOTION. 



OUR inquiry thus far leads manifestly to the conclu- 

 sion that all motion, whether molar or molecular, 

 must necessarily follow the same laws. Or, more pre- 

 cisely, all motion, whether molar or molecular, is ever 

 the manifestation of the same primal relations existing 

 between the force-centers of the real world in space, 

 whether those force-centers be considered as simple or 

 as aggregated into more or less extended groups. 



On the other hand, we have already seen that, along 

 with increased complexity of grouping of force-centers, 

 there develops also increased intensity of strain, which 

 further results in the bringing into realization of new and 

 richer qualitative characteristics. 



It is this development which takes place more especially 

 in the sphere of molecular motion. 



The grouping itself, indeed, is due to the mutual 

 attractions between the simplest force-centers ; so that all 

 attraction may be regarded as ultimately atomic. But 

 the more closely these centers are gathered, the more 

 intense becomes the strain between them. That is, the 

 more strongly does the mutual attraction between any 

 two centers oppose the realization of the qualitative 

 result that would otherwise naturally follow from the 

 attraction between either of these two and any other 

 center. 



178 



