cE AS TO SOUNDNESS. 99 
being catty seeped, keeps the veins overloaded ; and. 
the veins, jin holding their liquid load unduly long, and 
aot being relieved of it in time, allow some of its more 
watery portions to filter through their coats into the 
surrounding cellular tissue ;, the greatest amount escaping, 
as you might expect, through the parts-subject to the 
greatest pressure, the most dependent parts—the legs. ° 
If, then, you have filled legs, recollect that the horse 
has an enfeebled heart, and therefore Jessened arterial 
tension, which shows itself by sweating on,exertion and 
distressed breathing ; and that the horse cannot do the 
work of a healthy horse without the risk of congested 
lungs, cardiac asthenia, and death itself. 
We shall resume our subject to-morrow. 
