90 HORSE-BACK RIDING. 



subdued by sensible and psychical impressions, of 

 which these two faculties alone should be the sover- 

 eign regulators. 



It is now a recognized fact that the agent of the 

 materia medica proper seldom, if ever, does more than 

 palliate this trouble, and that the proper treatment 

 consists in appropriate regimen, suitable mental oc- 

 cupation and exercise. 



In man there often exists an analogous state, 

 indicated by melancholy, fear, palpitation of the 

 heart, ringing in the ears, headache and disordered 

 digestion. 



With these states we may group certain disorders, 

 having their seat in the reproductive organs, such as 

 nymphomania, onanism, impotency, and sterility — all 

 caused by the same moral and mental conditions and 

 yielding to the same treatment. 



d. Chorea (St. Vitus' dance). — A disease charac- 

 terized by irregular, tremulous, and often ludicrous 

 movements of certain portions of the body, usually 

 of the head and face, the movements being to a slight 

 extent under the control of the will. 



After the disorder has persisted for a time, the 

 brain seems to become involved, and impairment of 

 the memory and irritability of temper result ; the 

 digestive organs become involved also ; sleeplessness 

 follows, and finally the general health suffers. 



It is a disease of childhood and puberty, rarely oc- 

 curring before the age of six, most frequently between 



