202 DISEASES OF THE HORSE. 



tears from tlie eye down the side of the face, instead of 

 through their proper channel. 



Cause. — Obstruction in the lachrymal sac, or nasal 

 duct, from a disease cdiWQdi fistula lachrymalis. 



Treatment. — This is the province of the surgeon and 

 anatomist. 



Wens. — The common name for external tumors. 



Wheezing. — This is a sound given from the horse, 

 having enlarged glands, or thickening of the membrane 

 of the wind pipe, or the glands pressing upon its head 

 decreasing its calibre. Whistling is caused by the same 

 alteration of structure in the wind-pipe. 



Whirl-Bone, a Sprain of —(See Sprains and 

 Hock.) 



Wind-Sucking.— (See Crib-Biter.) 



Worms. — The worms which inhabit the body of the 

 horse are of many varieties. Some of them are harmless, 

 and the others interfere with the health of the horse. 1st. 

 The bot or oeestrus equi, found inhabiting the stomach. 

 2d. The oestrus Hcemorrhoidalis or Fundament bot 

 found in the rectum, and often seen about the anus, and 

 under the tail. 3d. The strongylus, and Filaria., found 

 in the aorta, and other blood vessels. 4th. The asea- 

 rides vermicularis, found in small cells within the mucous 

 covering the coecum, or blind gut. 5th. Filaria, found 

 in the aqurous humour of the eye. 



(1.) Stomach Bot. — These worms are the result of 

 turning horses out to pasture in the summer months, and 

 are produced from the eggs laid or glued to the fore legs 

 of the horse, by the bot fly. 



Symptoms. — An unthrifty coat, and loss of flesh after 



