BIOLOGY IN HUMAN AFFAIRS 



plexity of even these in their actual integration is the 

 impressive contribution. Of all the "primitive" psychol- 

 ogies of recent years, the glandular psychology is the most 

 illuminating. The glands of internal secretion are notable 

 for their varied influence on growth and behavior; the 

 externally secreting glands are no less important, w^ith 

 their distinctive connection v^ith the several divisions of 

 the autonomic nervous system. We have a rich documen- 

 tation that mind and body are of one organic "condition- 

 ing," which is more correctly a "dispositioning" appearing 

 in temperament, and through temperament in career. 

 That gland deficiency may precipitate gross mental in- 

 capacity, that excessive glandular functioning induces 

 emotional and "rational" disturbances — all this gives 

 "physiological psychology" an intimacy and scope of 

 meaning available to no previous generation. Such sug- 

 gestions as that the new (biologically) pons or great 

 cable of connection between big and little brain, makes 

 possible the amazing skill of the human organism in acro- 

 batic posture and manual dexterity; that the overgrowth 

 of the neo-pallium, displacing and replacing the rhinen- 

 cephalon or "olfactory brain" of lowlier creatures, condi- 

 tions the human rational stage of behavior — these are 

 but glimpses of the endless script of the affairs of mind, 

 legible in the partially deciphered characters, gross and 

 fine, of the nervous system. 



Such knowledge affords data tor a version more profound 

 than is yet available of the neurological romance. It is 

 this plot that found popularity in "Why We Behave Like 

 Human Beings." In recognition of this directive approach, 

 our present era may be said to find its focal expression in 

 the neurological concept of behavior. Such a conjunction 

 is vital to modern psychology. 



In continuing the genealogy according to the records, 

 we find the first experimental studies in the field of sensa- 



[64] 



