APPENDIX. 125 



viz: " White Speks and Cloudiness of the Eye," 

 "Ulcers of the Transparent Cornea," ' 'Tumors of 

 Transparent Cornea," arid "Retuntis", and come 

 down "at once to description of the subject before 

 us, namely, moon-blindness, or periodic ophthal- 

 mia. Causes This disease of such fatal forebod- 

 ing to the intelligent and experienced veternarian 

 is ascribed to hereditary predisposition ; breed- 

 ing in dark, damp, cloudy or marshy localities ; 

 keeping in close, dark, and badly arranged 

 stables ; forceing beyond any reasonable speed ; 

 pulling beyond their reasonable load, or any- 

 thing that is calculated to overtax the true nerve 

 strength. 



SYMPTOMS : In many cases there is great 

 tension and solidity of the eye-ball, with an ap- 

 parent disposition to sink deeper in its socket. 

 The difference between this and simple inflam- 

 mation is that (unless cured) it comes on once in 

 one to three months observing about the same 

 interval until the poor sufferer is finally left to 

 grope his way through life in total darkness. In 

 the lucid intervals the transparent part of the eye 

 (or sight) retains a heavy bluish appearance 

 around its margin; the iris loses its natural lustre 

 and the anterior chamber begins to present more 

 or less deposit at its lower part, and the upper 

 eyelid is bent at an unnatural curve about one 

 third of its lenght from the inner angle, and 

 after a few similar attacks a cataract is formed, 

 and the case almost universally beyond the reach 

 of all reasonable hope of cure in any possible 

 way. 



PREVENTION: This disease like many others 

 being of a hereditary nature, avoid most scrupu- 

 lously propagating stock from either sire or dam 

 affected with this disease or that have lost either 



