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hot foetid breath, a frequent looking towards tlic 

 sides, and sometimes a striking of tiieni with the hin- 

 der foot; but, more particularly, the horse looks 

 unthrifty, his hair stairs, and is dry ; and though 

 his belly may be large and hard, the rest of his 

 carcass is lean. Bots are a short round worm, and 

 inhabit the stomach ; and unless they exist in pro- 

 digious quantities, which is sometimes the case, they 

 do not often do so much mischief as is supposed. 

 There is a dark round worm, longer tlwu bots, in- 

 habiting the large intestines, and w'lich are apt to do 

 more mischief ; there is likewise, but less frequently, 

 a long round worm similar to those found in chil- 

 dren. Horses are subject also, now and then, to 

 the small ascarides, or thread-worm, which com- 

 monly confine themselves to the rectum, or last gut, 

 and occasion an intolerable itching of the tail. 



Worms are known to exist not only by the fore- 

 going symptoms, but likewise by the presence of a 

 yellow matter at the anus, which horses having 

 worms are seldom without. 



All w'orms are very dithcult to destroy. Bots can 

 7;ardly be killed, even out of the stomach. Salt has 

 been said to destroy them ; or, rather, that horses 

 who have had salt now and then sprinkled in their 

 food have never been troubled with them. The 

 mineral poisons, as mercury, arsenic, S:c., have 

 been thought to kill them; but the effect is un- 

 certain. 



The other kinds are also as nearly asdiiJicult of re- 

 moval; but here mechanical means may be em- 

 ployed to more advantage, that is, the juices of the 

 intestines may be rendered unhealthy by a course of 



