76 NATIONAL TRENDS IN BIOLOGY 



which are brought to actuality in no other way than by 

 coming into just those relations which they are in when 

 constituting these bodies. And of all the evidences to this 

 effect, the most conclusive is that furnished by what I 

 myself as a rational and emotional being am able to get 

 from the air, food, and water which I consume. 



"It is undoubtedly a great thing that chemistry and 

 physics have confirmed and greatly extended universal 

 experience to the effect that without air, water, and food, 

 growing, playing, and working, feeling, and thinking, in 

 a word, 'living' is impossible. But so long as these 

 sciences tell us nothing, or next to nothing, as to exactly 

 what the portions of external nature that we utilize are 

 doing to enable us to do these things, they have fallen 

 exceedingly far short of fully explaining us to ourselves." 



And so, as modern zoologists are no longer inclined to 

 think of an animal as a system composed of individual 

 minor unities, but think of the entire organism as a real 

 and complete unity, the point of view resulting has caused 

 experimenters to apply their efforts toward solving the 

 problem of how this unity comes to be what it is. In fact, 

 Professor E. B. Wilson (1923) goes so far as to make the 

 problem of "organization" an ultimate category which is 

 to stand beside that of matter and energy. Subordinate 

 to this general problem of organization is that of control 

 or regulation of the development of the new individual. 



Professor Child, speaking of the organized individual, 

 defines individuality as follows : 



