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THE AMEBIC AN NATURALIST [Vol. XLIX 



(for example, configuration) from another less complicated im- 

 material factor, and so on. 



The chain of immaterial factors could in this manner logically 

 be pursued backward to the beginning of the embryogenesis, or 

 to the egg. 



As to the relation of such immaterial factors to Driesch's 

 entelechy, they can be ranged solely in the category of "means" 

 (Mittel) of the latter for the purpose of morphogenesis. 



But I repeat that this is for me a matter belonging for the 

 present not to experimental investigation, but to the domain of 

 ' ' Naturphilosophie. ' ' 



If it appears as if I agree in this point with the "standpoint 

 of radically experimental analysis" of Jennings, this is not 

 really the case. The latter author seems to reject all that does 

 not belong to experimental investigation. 



I think, on the contrary, that vigorously logical considerations, 

 deductive and even inductive, on the given empirical data form 

 a legitimate and integral part of our science of nature. 



A. Gurwitsch 



The Woman's University, 

 Petrograd, 

 April, 1915 



