Avery's own farrier. 67 



Si/?nploms, indicating worms, are various, as there are 

 different kinds of those vermin, occupying different parts 

 of the body. Sometimes the horse is lean and jaded, 

 his coat rough and staring, and sometimes there is a 

 white fur to be seen on the end of the straight gut, and 

 at other times he froths and drools at the mouth when 

 driven (without any evident cause to many"), and, though 

 he has a remarkable appetite, he does not thrive. Now 

 my medicine and preventive will kill and destroy the 

 whole family of intestinal worms and bots, of every kind 

 and description. 



Cause of Bots. — It is well known that there is a large 

 fly, resembling the wasp (and called by some the bot fly), 

 that is continually teasing the horse in hot weather in 

 summer, and continually depositing its nits or eggs in 

 innumerable quantities about the legs, neck and breast of 

 the horse. These are taken into the stomach by his nip- 

 ping and biting, and there they are hatched and trans- 

 muted into bots, which so much annoy him afterwards. 

 Some may doubt this, and to those I would say, just try 

 the experiment of taking some of these nits from the 

 horse's legs in warm weather in summer, and put them 

 in the hollow of the hand, add spittle w^arm from the 

 mouth, then place the thumb of the other hand upon 

 thj^ and sit quietly one hour, in which time they will 

 hatch and crawl on your taking your thumb off from them, 

 and I doubt not if they were kept in the right tempera- 

 ture, well moistened, that in a few hours you might see 

 the full-grown bot. They are most likely to trouble the 

 horse soon after he is first turned to pasture, and when 

 he is put up; although any derangement of the stomach 



