22 



SEATS AND SADDLES. 



to be moved either to front or rear, but sufficiently 

 tight to retain them in the position in which they are 

 placed. A small weight is then placed exactly on the 

 centre point of the board at p, the four legs being 



Fig. 1. 



adjusted square, as at x x x x. If the weight be not 

 so heavy as to overcome the slight friction of the heads 

 of the screws, the board will remain in its position 

 that is, it will stand ; but if it be removed towards one 

 end of the board, say to p*-, it will cause the board to 

 turn on the screwheads, and, if not prevented, slide 

 down towards /; but if the two legs at this end be 

 bent backwards to x 1 x 1 , the board will support the 

 weight as before. In like manner, if the weight be 

 removed in the other direction to p*, the legs being 

 square, the same thing will occur, and the board will 

 turn on its legs and slide down towards h, which, how- 

 ever, may be prevented by adjusting the same pair of 

 legs as before, and which here represent the hind legs 

 of the horse, to the position # 2 x 2 , and in both these 

 cases the board will assume a slanting position, in which 

 the end a b will be lower. Or, the weight being at 

 p 2 , the board may be made to stand by adjusting the 

 other pair of legs, representing the horse's fore legs, to 



