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moth. But as no other animal whatever har 

 teeth whose mechanical action at all corres- 

 ponds Vvdth those of the Mammoth, we arc 

 forbid by the invariable concordance of nature, 

 to suppose that his food could have resembled 

 thai of those whose teeth are differently con- 

 structed. The teeth of all anlm.als living on 

 grass, bark, branches, roots, nuts, &c. are 

 veined internally with enamel, and they ope- 

 rate by grinding backwards and forwards, like 

 the Liephant, Squirrel, &c. 5 from side to side, 

 like die Horse, Sheep, &c. -, or in a circular 

 manner produced by both motions. Ox, Ass, 

 &c. And in all these animals their teeth 

 seem expressly constructed to accord with such 

 motions ; so invariable indeed, that any one 

 may arrange these graminivorous teeth, whe- 

 ther the animals to which they belonged be 

 known or unknown to him, by a very simple 

 rule : When the action of the jaws is back- 

 wards and forwards, the enamel runs, more or 

 less, acrc:s the tceih ; when the action is from 

 side to side, the enamel is more or less length- 

 wise ; and when there is the rotatory motion, 

 the fieure of the enamel is more irrei^ular and 

 serpentine, resembling a Chinese character. 



