SOUND AND UNSOUND HORSES 



catoptric test as a '' general " one, and 

 with the ophthalmoscope for a "special," 

 if required. Bear in mind that three 

 images should be seen (in the normal 

 eye), two erect, moving in the same 

 direction as the candle, and the third 

 an inverted one, moving in a dia- 

 metrically opposite direction. 



In cataract, the third image is either 

 very indistinct, or else absent. It is a 

 very good plan to dilate the pupil with 

 sol atropine sulph. (4 grains to ounce). 



3. — Back and bend the horse sharply, 

 so as to try and make him show — if 

 present — stringhalt or chorea. 



4. — Test his respiratory and circula- 

 tory apparatus. 



To merely " grunt " a horse is in- 

 sufficient. Many roarers do not grunt 

 when a feint is made to strike them. 

 It is useful in its way, but does not 

 afford one positive evidence. 



Take the pulse whilst the horse is 



i8j 



