DISEASES OF THE BRAIN AND NERVOUS SYSTEM. 259 



parade, on the rout, in the ranks, in action, and in the stable; 

 but if she once caught a glimpse of a gray or white horse, 

 she rested not until she had thrown her rider or broken her 

 halter, and then she rushed on her imagined foe with the 

 greatest fury. She generally contrived to seize the animal by 

 the head or throat, and held him so fast that she would suf- 

 focate him, if he were not promptly released from her bite. 



"Another mare exhibited no terror except of white, inani- 

 mate objects, as white mantles or coats, and particularly 

 white plumes. She would fly from them if she could; but if 

 she was unable to accomplish this, she would rush furiously 

 upon them, strike at them with her fore-feet, and tear them 

 with her teeth. 



" These instances are selected from various others, because 

 they approach so nearly to what would be termed insanity in 

 the human being. It is confined to one object — it is a species 

 of monomania, and as decided insanity as ever the biped dis- 

 covered. One of these horses, the second, was, b^^ long and 

 kind attention, divested of this insane terror, and became 

 perfectly quiet and useful; but the other three bid defiance 

 to all means of cure, and to coercion among the rest." 



