PREMATURE WEAR OF THE TEETH. 
37 
(e) premature wear of the teeth. 
Defective resisting power in the teeth and the consumption of hard 
food sometimes produce premature wear, so that the animal becomes 
Fig. 15.—Tooth screw. 
Fig. 16.— Metznik’s improved Tootli 
Shears with interchangeable jaws. 
unable to grind its food properly. This condition is met with in 
herbivora as well as in carnivora. Dralle found all the molars in a 
twelve-year old horse so much worn and so loose, that they could be 
partially withdrawn from their sockets with the fingers. Pallin wrongly 
