of the Animals of the Farm. 417 
is not possible to assert from the states of the incisor teeth 
whether an animal is under or over the age of one year. 
Fig. 25. — Molars of Calf at six months. 
The illustration (Fig. 26) represents the average state of the 
incisors at the age of one year. 
Fig. 26. — Incisors of Steer at one year. 
VOL. XVIII. — S. S. 
