AS THE BIOLOGIST SEES IT 



cannot be prophesied by any naturalist 

 with ever so complete knowledge of the 

 reflexes and tropisms exhibited by very 

 simple animals. That is, the inevitable 

 and immediate responses of Paramoecium 

 or houseflies or just hatched spiderlings 

 to physical and chemical stimuli, which 

 responses, in sum, compose their be 

 havior, may have their vestiges in man 

 and do have certain parallels, as in the be 

 havior of the internal organs and certain 

 external reflexes. But for the most part 

 man turns towards or away from light, or 

 finds a seat in a corner or out away from 

 the room walls, because he is influenced 

 by factors very different from simple 

 physical and chemical ones, factors which 

 may be of a week ago or a mile away. It 

 is these non-mechanistic factors or con 

 ditions in human life, and their results, 

 that constitute that part of human life, 

 which is peculiarly the human part, that 

 the biologist must hesitate to be dogmatic 

 about. Yet this part must ever have a 

 seizing interest for him that is, if he 

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