WHY WAS THIS THEORY NOT STATED BEFORE 257 



hends all these things in a single unity, that extends 

 everywhere and leaves nothing outside its scope. "^ 

 A strong plea for the stating of the facts of psy- 

 chology in the general terms of science is made by 

 the psychologist, J, B. Watson, formerly of Johns 

 Hopkins University: "The key which will unlock 

 the door of any other scientific structure will unlock 

 the door of psychology. The differences among the 

 various sciences now are only those necessitated by 

 the division of labor. Until psychology recognizes 

 this and discards everything which cannot be stated 

 in the universal terms of science, she does not deserve 

 her place in the sun."^° 

 Thus Jacques Loeb : 



"The physical researches of the last ten years 

 have put the atomistic theory of matter and 

 electricity on a definite and in all probability 

 permanent basis. We know the exact number of 

 molecules in a given mass of any substance whose 

 molecular weight is known to us, and we know 

 the exact charge of a single electron. This per- 

 mits us to state as the ultimate aim of the 

 physical sciences the visualization of all phe- 

 nomena in terms of groupings and displacements 

 of ultimate particles, and since there is no dis- 



' Monism as the Goal of Civilization, 5, 6. 

 ^^ Psychology from the Standpoint of Behavior. 



