50 HEREDITY AND ENVIRONMENT 



be traced back to certain fundamental struc- 

 tures of the germ cell, so the characteristics of 

 the mind may be traced back to certain funda- 

 mental properties and activities of the germ. 

 Many of the psychical processes may be traced 

 back in their development to properties of 

 sensitivity, reflex motions, and persistence of 

 the effects of stimuli. All organisms manifest 

 these properties and for aught we know to 

 the contrary they may be original and neces- 

 sary characteristics of living things. In the 

 simplest protoplasm we find organization, that 

 is, structure and function, and in germinal 

 protoplasm we find the elements of the mind 

 as well as of the body, and the problem of the 

 ultimate relation of the two is the same 

 whether we consider the organism in its germi- 

 nal or in its adult stage. 



In some way the mind as well as the body 

 develops out of the germ. What are the 

 germinal bases of mind? What are the psy- 

 chical Anlagen in embryos and how do they 

 develop? In this case, even more than in the 

 development of the body, we are compelled to 

 rely upon the comparison of human develop- 



