NATURAL HISTORY OP THE HORSE. 



01 



nippers and four grinders above and below in each jaw, which, 

 with the alteration in the nippers just described, will enable us 

 to calculate the age of foal, subject to some variations, arising 

 from the period of weaning and the nature of the food. 



At the age of one year and a half, the mark in the central 

 nippers will be much shorter and fainter; that in the two other 

 pairs will have undergone an 

 evident change, and all the 

 nippers will be flat. At two 

 years this will be more mani- 

 fest. The accompanying cut 

 deserves attention, as giving 

 an accurate representation of 

 the nippers in the lower jaw 

 of a two-year-old colt. 



About this period a fifth 

 grinder will appear, and now 

 likewise commences another 

 adapted to the size and wants of the young animal. They are 

 sufi&ciently large to occupy and fill the colt's jaws ; but when 

 these bones have expanded with the increasing growth of the 

 animal, the teeth are separated too far from each other to be 

 useful, and another and larger set is required. The second 

 teeth then begin to push up from below, and the fangs of the 

 first are absorbed, until the former approach the surface of the 

 gum, when they drop out. "Where the temporary teeth do not 

 rise immediately under the milk teeth, but by their sides, the 

 latter being pressed sideways are absorbed throughout their 

 whole length. They grow narrow, are pushed out of place, 

 and cause inconvenience to the gum, and sometimes to the 



TWO TEAKS TEETH. 



process. The first teeth are 



