MOUTH DISEASES. 131 



of the colon, and another the mesorectunij which encloses 

 the rectum. 



Mesenterica. — Wasting of the mesentery is a di- 

 sease which is not very common to horses, although some 

 clearly marked cases are sometimes seen, characterized 

 by wasting of the body, weakness, and general debility of 

 the whole system. Bowels irregular: — sometimes 8oft, 

 at other times hard, and of a pale or straw color, and fre- 

 quently of bad smell. All that can be done is to keep 

 the strength and condition of the horse up by iron and 

 gentian, which is so often recommended throughout the 

 book. 



Metastasis. — A term denoting a change or shifting 

 of disease from one part of the body to another, which is 

 so well illustrated in cases of rheumatism. 



Moon Blindness. — (See Eye Diseases.) 

 Mortification. — Death of a part, (See Gangrene.) 

 Moribund. — A term in use, and applied when man or 

 animals are in a dying condition. 



Mouth Diseases Of. — These are but few; perhaps 

 the irregularities of the teeth are the most important ; so 

 much is this the case, that from diseased or carious teeth, 

 an affection, to many external appearances, is similar to 

 glanders; and horses have accordingly been destroyed, 

 whereas, if a carious tooth, producing a stinking dis- 

 charge from the nose had l3een removed, these appear- 

 ances would have passed off. The edges of the teeth of 

 horses, at all ages, are apt to become sharp, and cut or 

 wound the inside of the mouth, and interfere with mas- 

 tication or chewing. When horses are off of their feed 

 and losing flesh, it will be well to have the teeth examined. 



