Functional Action. 8g 



the direct agency of physical forces and perpetual 

 motion, seem to us to stand on the same plane sci- 

 entifically considered. But if one doubts this or 

 can see farther and discern a transmutation of forces 

 unperceived by common minds, still the fact remains 

 that there is something within the living body that 

 works with a purpose in regard to the whole struct- 

 ure at any given time, for its preservation and also 

 for the continuance of the kind. It not only selects 

 proper materials for its work, but it stores up ma- 

 terial for use at certain times, as fat in the fall of 

 the year for the use of hibernating animals, and lime 

 in crustaceans to suddenly form the new shell when 

 the old one is cast. It thickens the coverins; for 

 winter and throws off hair and fur when they are 

 no longer needed. When bones are broken or 

 wounds formed, it sets in motion machinery to re- 

 pair the damage. In all this we see going on with- 

 in the body perpetually the same sort of work that 

 we find going on out of the body through that agen- 

 cy which we call Instinct. And however diverse 

 these bodies are in structure and the function of 

 their organs, we find the Instinct connected with 

 each, fitted to carry out to perfection the work be- 

 gun within the body where the senses and volition 

 of the animal have no agency in the operations. 

 We can say of every animal that we find its Physi- 

 ology and Instinct working together, one always 

 supplementing the other so far as Instinct is need- 

 ed to secure the life of a single animal or the con- 

 tinuance of the kind. 



And so far as we can see, the structure, function 



