4. Ox CERTAIN OTHER FEATURES or MORPHOGENESIS 

 ADVOCATING ITS AUTONOMY 



OUR next studies on the physiology of form will be 

 devoted in the first place to some additional remarks about 

 our harmonious-equipotential systems themselves, and about 

 some other kinds of morphogenetic " systems " which show 

 a certain sort of relationship with them. For it is of the 

 greatest importance that we should become as familiar as 

 possible with all those facts in the physiology of form upon 

 the analysis of which are to be based almost all of the 

 future theories that we shall have to develop in biology 

 proper and philosophical. Our discussions, so far as they 

 relate to questions of actual fact, will contain only one 

 other topic of the same importance. 



But though it is designed to complete and to deepen 

 our analysis, the present considerations may yet be said to 

 mark a point of rest in the whole of our discussions : we have 

 followed one single line of argumentation from the beginning 

 until now ; this line or this stream of thought, as you 

 might call it, is now to break into different branches for a 

 while, as if it had entered from a rocky defile into a plain. 

 It seems to me that such a short rest will be not uncon- 

 ducive to a right understanding of all we have made out ; 

 and such a full and real conceiving again, such a realising 



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