382 CHAPTER 54. 



to prevent gripinfj:, will effect a teniporury eleaiiuiee. Or ;i draeliiu of 

 tartarLsed antinioiiy may be triveu for six cousecutive mornings before the 

 horse is fed, followed on the seventh day by a dose of physic. A dradim 

 of calomel for two or three consecutive niglits, followed by a dose of 

 physic given on the third morning fasting will also answer. The small 

 worms, which inhabit the rectum, may sometimes be cleared away by 

 injections of a weak solution of salt, or of lurpentine and linseed oil, or 

 infusion of quassia. 



A change of diet is desirable. Salt in the manger is beneficial. Min- 

 ei'al and vegetable tonics are useful in improving the condition. Worms, 

 however, not\\'ithstanding the temporary clearance effected by medicine, 

 are apt to reappear after a time. 



784. Worm in the Eye. 



In India a worm is occasionally found floating in the aqueous humour. 

 The treatment consists in puncturing the cornea at its u})per inner 

 margin. The humour will then escape, and will carry with it the worm. 

 The humour soon re-forms, the wound readily heals, and in general no 

 after-injurious result ensues. The inner margin is selected for the opera- 

 tion because the cornea at that ])art is least dense ; and the upper instead 

 of the lower margin, because the aqueous humour, which gradually re- 

 forms, will be less likely to again escape (whilst the wound is healing) 

 than if the incision has been made at the lower part ; and the resulting 

 cicatrix on the cornea is less likely to interfei'e with the vision. 



