CHAPTEE XIX 



THE SCIENTIFIC IMAGINATION 



PSYCHOLOGY, or the science of mental life as re- 

 vealed in behavior, has been greatly indebted to 

 physiologists and to students of medicine in general. 

 Any attempt to catalogue the names of those who 

 have approached the study of the mind from the 

 direction of the natural sciences is liable to prove 

 unsatisfactory, and a brief list is sure to entail many 

 important omissions. The mention of Locke, Chesel- 

 den, Hartley, Cabanis, Young, Weber. Gall, M til- 

 ler, Du Bois-Reymond, Bell, Magendie, Helmholtz, 

 Darwin, Lotze, Ferrier, Goltz, Munk, Mosso, Mauds- 

 ley, Carpenter, Galton, Hering, Clouston, James, 

 Janet, Kraepelin, Flechsig, and Wundt will, however, 

 serve to remind us of the richness of the contribu- 

 tion of the natural sciences to the so-called mental 

 science. Indeed, physiology would be incomplete 

 unless it took account of the functions of the sense 

 organs, of the sensory and motor nerves, of the brain 

 with its association areas, as well as the expression 

 of the emotions, and the changes of function accom- 

 panying the development of the nervous system, 

 from the formation of the embryo till physical disso- 

 lution, and from' species of the simplest to those of 

 the most complex organization. 



At the beginning of the nineteenth century the 

 French physician Cabanis was disposed to identify 

 human personality with mere nervous organization 



