Organic Connection Between Physical and Psychical 



the total scheme, then, actual and imagined, various "sub- 

 stances" are indispensable. 



That the imaginary constituents constitute a very im- 

 portant part of the explanation is obvious. This fact is, 

 however, not specially objectionable. It is not if its true 

 character is never forgotten. But here comes the point I 

 wish to make focal just now. If imagination is to be given 

 a place at all in the argument it must have a larger place 

 than Loeb has accorded it. Otherwise the teachings of 

 evolution, i.e., the genetic continuity in biology, are tacitly 

 repudiated. Attention has previously been called, especially 

 in the chapter on the organism and its chemistry, to the deep 

 current of virtual anti-geneticism which runs through physi- 

 ology generally, and particularly through bio-chemistry. 

 Undoubtedly we can imagine "substances" produced and de- 

 stroyed in such a complex of activities as that described, to 

 meet exactly the needs of the larva ; but can we legitimately 

 imagine them to be so produced and so destroyed by any 

 other means than just by the particular animals in question, 

 that is, by the organisms? Various of our discussions, but 

 particularly those in which the specificity of protoplasm 

 have been dwelt upon, constitute a decisive negative answer 

 to this question. Xo causal explanation of the requisite 

 "substances" imagined can stop short of the organism, alive 

 and normal, as an essential and "causal factor" in the phe- 

 nomena presented. Causal explanation of tropisms which 

 aims to reach a physico-chemical basis is really organismal 

 as well as are tropisms seen through the medium of pure 

 description. 



The Automatic and Anticipatory Character of Tropisms and 



Other Re^exes 



Nor should the reader fail to note the intrinsicality, the 

 adaptiveness, and the anticipatoriness, of tropisms as illus- 



