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of fever. On other days the animal is lively ; eats 

 well, looks well, and works well, and is all the 

 owner could desire. Something is evidently wrong, 

 but as yet all is doubt : then the hay is quidded 

 and another examination of the molars is made, 

 when there may be detected a little roughness on 

 some part of one of those teeth, and the mystery 

 is explained. There may be no, or a very slight 

 increased growth of the molar, which, in the op- 

 posing jaw, corresponds to that which is evidently 

 carious. The carious tooth may be firmly implanted ; 

 and yet, notwithstanding the firm manner in which 

 it is fixed in the jaw, no time ought to be lost in its 

 removal. The operation may occupy some time, 

 and should be conducted with proper caution if the 

 horse be young ; and I have by me a molar taken 

 from the jaw of a colt that was rising four, in 

 which the crusta petrosa was diseased. A wood-cut 

 representing that tooth, is inserted at page 29 ; and 

 the darker spot indicates the place where decay had 

 commenced. During youth the fangs of the molars 

 are of great length, consequently, any violence 

 would be likely to do injury to the thin plates of the 

 alveolar cavity. In old animals the fangs being 



