LENGTH OF LIMB. 



151 



slow for his size. The cause of his lack of speed is chiefly 

 owing" to the weakness of his "rearing muscles " (i-(?(? p. 64), 

 and to the straisfhtness of the column of bones of his fore- 

 limb i^see p. 63). Hence, when he tries to go quickly, he is 

 unable to raise his forehand sufficiently to obtain a well- 

 regulated period of suspension, like that of the horse {see 

 Figs. 46, 88 and 102). His gallop, which he attempts 



Fig. 170. — Camel. 



only on rare occasions, has so much up and down motion in 

 it, that he can continue it but for a very short time. His 

 usual fast pace is a kind of amble which has no period of 

 suspension. Many " weedy " horses {see p. 267) which have 

 long legs, are deficient in speed from causes similar to those 

 that render the camel slow. The law as to length of limb 

 can be amply verified, other things being equal, in the case of 

 the horse, by the hard logic of statistics. I accordingly give 



