3^8 COMPENDIUM OF THE VETERINARY ART. 



by the first inteiitiDii : but when it is opened 

 by a rusty blunt fleavi or lancet, and par- 

 trcularly when the instrnnient is driven with 

 such violence as to cut not only Jnto but 

 through the vein, makino- thus an orifice 

 both before and behind, it seldom heals so 

 readily: on the contrary, infiammation takes 

 place within the cavity of the vein, which 

 gradually extends or spreads until either the 

 v>--pund is closed, or the vein obliterated, by 

 the coagulating matter which forms within it. 

 If the inflammation extend to the heart, the 

 animal is instantly destroyed ; more commonly, 

 however, the vein is soon plugged up, and 

 ceases to convey bloud. But even in this 

 case the disease proves very troublesome; in 

 consequence of the Jugular or neck veins 

 being the principal channels, by vvhich the 

 blood of the head returns to the heart. This 

 obstruction to the return of the blood causes 

 a swelling of the large gland under the ear, 

 in which the formation of matter is often a 

 consequence. Sometimes the eye becomes 

 intlamed; and I have seen symptoms of 

 apoplexy or staggers produced by this cause. 

 If a horse be turned to grass in this situation, 

 the inconvenience is considerably increased; 



