170 GLANDS IN HEALTH AND DISEASE 



of the autonomic system which is the primary 

 'agency in mobilizing the bodily forces in times of 

 great fear or rage. . . . These suggestions imply 

 coordination of chemical and nervous factors, but 

 not a dependence of the nervous factors on the 

 chemical." 



Professor Cannon's book. Under "Bibliography" 

 towards the end of the book I shall include suffi- 

 cient references to Cannon's papers so that the 

 reader who desires it may get inspiration from the 

 original source; but I cannot resist the temptation 

 of dwelling, if only for a minute or two, on his 

 book, "Bodily Changes in Pain, Hunger, Fear and 

 Kage," a sequel to an earlier and no less celebrated 

 volume, "The Mechanical Factors in Digestion." 

 It is a record of an attempt to investigate certain 

 psychological reactions some of which have al- 

 ready been discussed in these pages by means of 

 recognized methods in experimental physiology. 

 The writer is strongly convinced that the great ad- 

 vances in psychology are not to be expected so 

 much from the psychologist who is an arm-chair 

 philosopher or who dabbles in "efficiency" tests, as 

 from those men whose training has been in the ex- 

 perimental sciences primarily, in chemistry, 

 physics and biology. I do not of course mean that 

 the philosopher has no contribution to make ; I do 

 not belong to the ultra-scientific school which takes 

 it for granted that it, and it alone, can lay claim to 



