Diseases of Blood-vessels and Lymjphatics 211 



(horse, ox and sheep, Unseed oil or Glauber salts ; pig and 

 dog, castor oil,) and afterward diuretics and sedatives. 



The persistence of the plugging and lamene&a must be 

 met by patience, the animal being turned into a small 

 yard or paddock where he can take gentle exercise and 

 live weU, until the collateral vessels have had time to en- 

 large and carry on the circulation. Three or four months 

 win sometimes secure a tolerable recovery. 



DILATATIONS OF THE ARTERIES. ASEUEISMS. 



These are mostly seen in the horse among domestic an- 

 imals, and even in him much more rarely than in man. 

 The causes are generally severe strains in the vicinity of 

 an artery, or over-stretching of the vessel itself. They 

 are also common in the mesenteric arteries of horses from 

 the presence of immature worms (Sderostomum Equinum) 

 in the circulatiag blood. Injuries to the walls of the ves- 

 sels are much less liable to be followed by aneurism than 

 ia man, because of the greater plasticity of the blood, and 

 the speedy formation of a covering of coagulable lymph. 

 They are soft, fluctuatkig, pulsating tumors, effaceable by 

 pressure, but reappearing at once. Being usually situated 

 iatemally, treatment can rarely be adopted. But when 

 superficial, compression has been most successful alike in 

 the horse and dog. It is needless to recount the many 

 other modes of treatment for such an unusual affection. 



DISEASES OF VEINS. 

 WOUNDS OF VEINS. 



These give rise to the escape of a dark red blood in a 

 steady stream. This is commonly to be arrested by pin- 

 niag up the lips of the wound evenly, taking hold of each 

 by one-eighth inch and tying them together by a little 

 tow, twisted round the two ends of the pia in the form of 

 the figure 8. Or several pins may be placed near each 

 other and the tow twisted round them and from pin to pin 

 in the same manner. Veins may be tied but this risks the 



