20 



HORSES AND RlDINa. 



Now, if we consider a horse's body as a heavy 

 cubic mass supported on four upright pillars, those 

 pillars being the legs, it will be apparent that if two 

 of those pillars are quite at one end of the weight 

 supported, and two are quite at the other end, it will 



Fig. 3. 



be evident, I say, that the pressure on each pair of 

 pillars will be equal ; that is, each pair of legs will 

 carry half the weight of the body (Fig. 3, A and B). 

 Let us now, without moving either the body or the 



