U HORSE. Class I. 



pillars of the oestrus, or gadfly ; these are found 

 both in the rectum, and in the stomach, and 

 when in the latter bring on convulsions, that 

 often terminate in death. 



The stone is a disease the horse is not fre- 

 quently subject to, yet we have seen two ex- 

 amples of it ; the one in a horse near High 

 Wycombe, which voided sixteen calculi, each of 

 an inch and a half diameter ; the other was of a 

 stone taken out of the bladder of a horse, and 

 deposited in the cabinet of the late Dr. Mead, 

 which weighed eleven ounces.* These stones are 

 formed of several crusts, each very smooth and 

 glossy ; their form triangular, but their edges 

 rounded, as if by collision against each other. 

 Age. The duration of the life of the horse seldom 



exceeds twenty-five or thirty years. M. Tuns- 

 tall adduced an instance of a horse left at Man- 

 chester in 1745, which died there in 1788 at 

 the age of forty-eight : it, almost to the last, 

 carried goods daily to the market. 



The all-wise Creator hath finely limited the 

 several services of domestic animals towards 

 the human race, and ordered that the parts of 

 such, which in their lives have been the most 

 useful, should after death contribute the lest to 

 our benefit. The chief use that the exuvia of 



* Museum Meadianum, p. 26l. 



