PATHOLOGY 87 



Hemorrhage may vary from an almost invisible dot to a 

 serious loss of blood. It may occur in practically any tissue, 

 under any membrane, and in any cavity ; or it may occur upon 

 the body surface. A tiny pin-point hemorrhage may be very 

 sigiiificant on the kidney in case of hog cholera, for example. 

 About one-fifteenth of the animal's weight is blood; and one- 

 half of this may be lost without necessary death. 



Dropsy results when there is a disturbance of the normal 

 balance between the movement of serum from the capillaries 

 into tlie lymph spaces, and from these spaces into thx, iymph 

 vessels, so that serum accumulates in lymph spaces. An ex- 

 ample of this condition is the "stocking" of the horse which 

 stands in the stable. "Stocking" disappears with exercise and 

 normal circulation. 



The seriousness of atrophy depends upon its extent and loca- 

 tion. Atrophy is frequently due to trouble elsewhere, which, 

 if not understood, leads to treatment at the wrong point. For 

 example, a horse steps on a nail, goes lame, and has a sweeny 

 at the shoulder. The first place for treatment is in the foot. 



Degenerations usually affect tissues which are already diseased. 

 Serious or even fatal degeneration is prevented by anticipating 

 and preventing the original trouble. 



