55S CATARACT. BLEEDING, ERRORS ; [BOOK IV. 



capable of cure by treatment as for a cold in the 

 nostril, where the superabundance of this watery 

 secretion naturally escapes by two ducts, that are 

 not unfrequently mistaken for glandulous chancres. 

 Not so, however, with a thickening of the crys- 

 talline humour, which causes cataract and another 

 disorder still more dangerous, which attacks horses 

 that have the best of eyes, and is called gittta serena. 

 When these exist the horse does not see well, as 

 may be discovered by his walk ; by his lifting his 

 fore legs very high, and carrying his ears alternately 

 one before and the other behind. . 



CHAPTER II. 



Blood-Letting. 



Every one, almost, can bleed a horse in some way 

 or other, and it is often found extremely desirable 

 that the operation should be performed without 

 delay. But, like many other excellent remedies 

 in the hands of unreflecting persons, this one is 

 frequently employed imperfectly, as well as too 

 often. Each has his peculiar notions, either as to 

 the fit part whence the blood should be taken, the 

 time when it becomes necessary, or the quantity 

 proper to be taken ; the latter being the more com- 

 mon error, as it is also the more excusable, in- 



