HO THE DATA OP BIOLOGY. 



arrived at, of the limit of Evolution. When treating of 

 equilibration as exhibited in organisms (First Principles, 

 173, 174), it was pointed out that the tendency is towards 

 the establishment of a balance between inner and outer 

 changes. It was shown that " the final structural arrange- 

 ments must be such as will meet all the forces acting on the 

 aggregate, by equivalent antagonistic forces," and that " the 

 maintenance of such a moving equilibrium " as an organism 

 displays, " requires the habitual genesis of internal forces 

 corresponding in number, directions, and amounts, to the 

 external incident forces as many inner functions, single or 

 combined, as there are single or combined outer actions to be 

 met." It was shown, too, that the relations among ideas are 

 ever in progress towards a better adjustment between mental 

 actions and those actions in the environment to which con- 

 duct must be adjusted. So that this continuous corre- 

 spondence between inner and outer relations which consti- 

 tutes Life, and the perfection of which is the perfection of 

 Life, answers completely to that state of organic moving 

 equilibrium which we saw arises in the course of Evolution 

 and tends ever to become more complete. 



