38 LESSONS IN HORSE JUDGING. 



is really the outer coYering of the eyeball. Per- 

 haps you will understand it better if we take an 

 example. Suppose you take an orange, and cut 

 a round piece of the skin or peel out about the 

 size of a half-crown piece, the whole of the peel, 

 or skin, which remains bears the same relation to 

 the orange that the outer coat, or white, bears to 

 the eyeball; that is to say, the skin which remains 

 of the orange, and the white tunic of the eye in 

 each case invests five parts out of six perhaps of 

 its respective sphere. 



We must make our orange do further service. 

 "When we have taken out the piece of the skin we 

 find the white rind underneath. Take a penknife 

 and cut a hole in this white part, the same as in 

 Fig. 6 J. 5; the hole we cut will represent the 

 opening known as the ^ pupil ' through which the 

 light passes into the eye. The remaining broad 

 rim of white rind (Fig. 5. A 2) will represent the 

 iris. Now if you have a watch-glass, the size of 

 half-a-crown, and place it over the hole from 

 which you at first cut the skin, the watch-glass 

 v^ll represent that glass-like covering of the eye 

 which we call the ' cornea. ' I fear we shall have 

 to draw rather largely on our imagination to caiTy 

 our illustration further. Let us see. Suppose 

 you have a pair of spectacles with round glasses 

 instead of oval ones, and you could remove one 

 of these glasses, and (without ruptiu-ing our arti- 

 ficial ' iris ') you could thrust it through the ' pu- 

 pil ' and place it immediately at the back of the 

 ^ iris, 'this glass lens would then represent the 

 * lens ' of the eye. Just a little further stretch of 



