64 WITHIN AND WITHOUT 



flow which has caused his rage. It may be 

 the flow from the interstitial tissue of the sex- 

 glands which engenders sexual feelings, but then 

 those are almost wholly physical, and only in a very 

 minor sense if even if any true sense psychical. 

 Persons who take the extreme view have never yet 

 suggested that there is a characteristic hormone 

 connected with those psychical attributes alluded 

 to in the chapter of the Corinthians recommended 

 to our notice by Butler. In fact they seem to 

 ignore all but the lower or vegetable characters 

 when dealing with psychology from the chemico- 

 physical point of view. 



Finally, we come again to the fatal and funda- 

 mental defect of this as of other " explanations " ; 

 it is an explanation " within the system" and 

 therefore unphilosophical in so far as it fails to 

 explain the facts through their ultimate or deepest 

 reasons. 



A large part of Loeb's book is devoted to a 

 description of the author's remarkable experi- 

 ments in artificial parthenogenesis, and an attempt 

 to show that they offer a complete explanation. 

 Sir William Tilden, one of the greatest living 

 authorities on organic chemistry, tells us that 

 " too much has been made of the curious observa- 

 tions of J. Loeb and others " ; and he definitely 

 states that when we consider " the propagation 

 of the animal races by the sexual process . . . 

 there can be no fear of contradiction in the state- 

 ment that in the whole range of physical and 

 chemical phenomena there is no ground for 

 even a suggestion of an explanation." Behind 



