380 CHAPTER 54. 



which secrete the skin. Others think that they originate in undue vas- 

 oularity of the true skin, by means of which an abnormal growth is gene- 

 rated. It is rertain that after removal they are apt to recur. 



780. Treatment. 



Warts should always be removed whilst yet small. The more common 

 practice is arsenic and lard in the proportion of one drachm of arsenic 

 to one ounce of lard. Two scratches should be made on the wart and a 

 small quantity of arsenic paste applied to the scratches. The wart will 

 fall out in a few days. 



Another good practice is to scrape the surface, and then dress with 

 chloride of lime. 



Some of our best Veterinary Surgeons prefer the knife in all cases, but 

 in some cases there is danger of cutting an artery. 



In some cases, when warts, without any appreciable base exist in parts 

 of the body causing them to interfere with the saddlery or harness, it 

 may be necessary to slough them out. 



A thin paste consisting of sulphuric acid and sulphur, spread over the 

 wart will produce the necessary sloughing process in the course of a few 

 days. The part must be afterwards treated as a simple wound. 



CHAPTER 51. 



BOTS AND WORMS. 



781. fiutt, 782. Inieaimal Worms. 783. Treatment. 784. Worm 



in the Eye. 



781. Bots. 



BOTS are the larvae or grubs of the (Estnis or Cad-fly. The eggs are 

 deposited on the legs, arms, knees, or body of the horse during the 

 autumn, and are licked off by the animal and hatched in the stomach 

 to the cuticular coat of which they cling by two strong hooks or tenacula. 

 Their heads, which are situated betAveen these hooks, are buried in the 

 lining of the stomach. They often adhere so tenaciously, that their 

 bodies may be broken, before they will quit their hold. They are some- 

 times found in the villous coat, and they but rarely extend into the duo- 

 denum. The mucus of the stomach seems to be their food. 



About June or July the bots are often voided in the dung, and they 

 then assume the chrysalis or grub form, and remain so for a few weeks, 

 when the case opens, and the fly takes wing. Bots, when being voided, 



