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ILLUSTRATED STOCK DOCTOR. 
and more circular mark appears within the center of the former one, tho 
most distinct in the central, or two central pairs — and which at eight 
years has spread over the six central incisors. 
At eight years, a change takes place which cannot be mistaken. The 
process of absorption has again commenced in the central ineisors; it is 
slow in progress, and is never carried to the extent seen in the milk teeth, 
but is sufficiently plain, and the two central teeth are evidently smaller 
than their neighbors. A considerable change has also taken place on the 
surface of the teeth ; the two dark marks are worn into one in all b lit the 
corner teeth. 
At ten the four central incisors are diminished in size, and the mark is 
becoming smaller and fainter, as shown in figure 14 . The six. central 
incisors are smaller, and at twelve, all of them are very considerably 
diminished; but not to the same extent as in tho young animal. Tho 
mark is now nearly obliterated, except in the corner teeth, and the insido 
edge is worn down to the gum. 
From this time on they continue to diminish in size, and it is difficult 
to accurately determine the age. In fact except in the case of valuable 
blooded cows, bulls, or extra trained woskoxen, and occasionally extra 
milkers in the dairy, few steers are now kept in the West past six years 
old, and few cows over nine or ten years of age. 
“• r • • .-V'V'P. 
I 
