5TRITCTTTRE OF TFFE TKKTH. 61 



Tims, the first five years of a horse may be considered as equiv- 

 alent to the first twenty in man ; or thns, that a horse of five 

 years old may be comparatively considered as old as a man of 

 twenty ; a horse of ten years as a man of forty ; a horse o^f fif- 

 teen as a man of fifty ; a horse of twenty as a man of sixty ; 

 of twenty-five as a man of seventy ; of thirty as a man of 

 eighty ; of thirty-five as a man of ninety. So far from this 

 comparison being in favor of the horse, I am disposed to think 

 it is too little. Horses of thirty-five years of age are as com- 

 mon as men of ninety, provided it be taken into account that 

 there are twenty human subjects for every horse ; and, unques- 

 tionably, a horse of forty-five is less rare than a man of a hun- 

 dred and ten." 



To this it may be added, that the early English racers ap- 

 pear to have been more addicted to longevity than those of 

 modern days, and the American horse generally than the Eng- 

 lish ; probably because, in the former case, the horse was not 

 put to hard work until his powers were developed by an advance 

 toward maturity. Two and three year old training was unknown 

 until a recent date ; and, in the latter case, in America, horses 

 generally are little used in harness, or for general work, until 

 they have attained to five or six years. 



We now proceed to consider the first appearance, and 

 successive changes of the teeth, with the marks and their de- 

 scriptions from the commencement unto maturity. The cuts 

 and letter press of these are both borrowed from Mr. Touatt's 

 admirable work. 



" Seven or eight months before the foal is rig. i. 



born, the germs or beginnings of the teeth are 

 visible in the cavities of the jaw^s. At the 

 time of birth, the first and second grinders have 

 appeared, large, compared with the size of the 

 jaw, seemingly filling it. In the course of seven 

 or eight days the two centre nippers are seen 

 as here represented. Fig. 1. 



" In the course of the first month the third 

 grinder appears, above and below, and not long 

 after, and generally before six weeks have expired, another inci- 

 sor above and below will be seen on each side of the two first, 



