[CM] 



fharp bodies, which he may chance to tread up- 

 on -, and in the fécond place of a more impor- 

 tant advantage both for his own, as well as his 

 rider's fake, which is, that in not paring away 

 the fole, nor fetting on any more fhoe than is 

 neceffary to preferve the horny fole, he will no 

 more be fubject to flip, neither upon the win- 

 ters icy pavement, nor upon the dry fmooth 

 one of the fummer feafon, which I (hall now 

 proceed to demonstrate. 



i. In making a horfe walk upon the frog 

 and partly upon the heel, the former being 

 ftrongly rubbed and pufhed againft the ground 

 or pavement, as it were, imprefTes itfelf, by 

 the weight of the horfe's body into the inequali- 

 ties and interfaces, it happens to meet in its way. 



2. By its flexibility it eafily receives the im- 

 preffions of fuch inequalities, fo as that the foot 

 refting upon a great many more parts which 

 mutually eafe it, by multiplying the points of 

 fupport, gives the animal a flronger adherence 

 and more fecurity upon the plane he goes upon. 

 It may even be afferted, that the frog acquires 

 a kind of fenfation, by its correfpondence with 

 the flefhy fole, and of this with the nerve j 

 which though I will not compare it with what 

 we feel in going barefoot -, yet this fenfation is 

 fully fufficient to give him proper warning of 

 the counterpoife he ought to put his body into, 

 for maintaining his equilibrium to keep himfelf 



from {tumbling and falling. 



The 



