OF VETERINARY MEDICINE. 137 



tinal wall forces it right into the expanded part. It is seen most 

 often in the ileum, a portion of which slips into itself or passes 

 out through the ilio-c?ecal valve into the colon. The coecum 

 sometimes becomes inverted into the colon. The result is ob- 

 struction of the bowel, and usually strangulation of both ends 

 of the fold. This causes death through gangrene of the invag- 

 inated part. 



Horses never recover from intussusception, but cattle some- 

 times do. Other animals do not recover. It is always fatal in 

 dogs. People sometimes recover in the same way as cattle do. 

 This condition is comparatively common in babies but rare in 

 adults. 



Semeioiogy of Intestinal Obstruction. — There are violent 

 colicky pains and the case grows worse in spite of treatment. 

 You may blunt the sensibilities with drugs but the disease grows 

 steadily worse. Death usually takes place in 10-20 hours. There 

 is a profuse perspiration ; haggard countenance ; occasional at- 

 tempts to vomit; animal is inclined to sit on his haunches; 

 strains as if trying to defecate ; apt to stretch a good deal ; al- 

 ways some flatulence ; before death he becomes quite stupid. 



Treatment. — We can only recommend general principles and 

 the first is a careful examination of the animal in hand, espe- 

 cially in case of entire males. Stallions have been treated for 

 colic when their trouble was hernia. When a stallion has colic 

 always examine him carefully for inguinal hernia. Give oil 

 ad libatum, a quart to start with and repeat in pint doses once or 

 twice a day. Give rectal injections, cannabis indica, choral hy- 

 drate, and morphia and counter-irri^.ation to the abdomen. Give 

 eserine, arecolin or barium chloride. 



Never neglect making a post-mortem examination on all ob- 

 scure intestinal affections. 



EA'ERSION OF THE RECTUM. 



Definition. — This is a protrusion of the rectum through- the 

 anus. The mucous membrane may extend out from the size of a 

 grape to several feet. It occurs in all animals. In parturient 



