110 SCIENCE AND PHILOSOPHY OF THE ORGANISM 



unfailing relative condition of formative causes and cause- 

 recipients. 



Finally, in functional harmony we have an expression 

 descriptive of the unity of organic function, and so we 

 may state, as the latest result of our analytical theory of 

 development up to this point, that individual morphogenesis 

 is marked by a threefold harmony among its parts. 



6. ON RESTITUTIONS 1 



At this stage we leave for a while our analytical 

 studies of ontogeny proper. We must not forget that 

 typical ontogenesis is not the only form in which morpho- 

 genesis can occur: the organic form is able to restore 

 disturbances of its organisation, and it certainly is to be 

 regarded as one of the chief problems of analytical morpho- 

 genesis to discover the specific and real stimulus which 

 calls forth the restoring processes. For simply to say that 

 the disturbance is the cause of the restoration would be to 

 evade the problem instead of attacking it. But there are 

 still some other problems peculiar to the doctrine of 

 restitutions. 



A few Remarks on Secondary Potencies and on Secondary 

 Morphogenetic Regulations in General 



We have only briefly mentioned in a previous chapter 

 that there exist many kinds of potencies of what we call 

 the secondary or truly restitutive type, and that their 

 distribution may be most various and quite independent 



1 Driesch, Die organischen Regulationen, Leipzig, 1901 ; Morgan, Regenera- 

 tion, New York, 1901. 



