126 ANIMAL DENTISTRY. 



formed that tlic most circumspect study of the mouth may 

 fail to detect the alteration. In these cases the cupping is 

 limited to the removal of the crusta petrosa within the in- 

 fundibula, thus leaving the cup with a perfect enamel bound- 

 ary. At that age the other retrogressive changes are not 

 pronounced and afford but little evidence to guide the diag- 

 nostician. (See Figs. 8^, 84, 85, 86.) 



Fig. 87. 

 The Ridiculous Effect of "Bishoping" Aged Horses. 



When horses are past the age of twelve years the results 

 of these operations are readily detected by the interrupted 

 contact of the incisor arcades and especially ])y the angle of 

 inclination, which is never altered by any natural anomaly 

 and which cannot be artificially changed. The shape of the 

 tables and the absence of enamel around the cup will also 

 lead readily to detection of the fraudulent attempts to make 

 very old horses appear younger. (See Fig. 87.) 



