PAIN, LAUGHTER AND WEEPING 329 



life lies in softer places there is always an excess of 

 energy above purely muscular needs. 



Proneness to laughter and to weeping is modified 

 by other conditions : by age, by sex, by training, by 



Photo by Brown Brothers, N.Y. 



FIG. 80. LAUGHTER IN A HEALTHY CHILD. 



An admirable illustration of the activation of facial muscles which is 

 associated with hearty laughter. 



mental states and, preeminently, by the state of 

 health of the individual. Healthy, happy children 

 are especially prone to laughter. (Fig. 80.) The aged 



