THE HORSES RESCUE. 



337 



fulcrum of levers sliown hi cut No. 10. At point C he can throw liis 

 weight forward and back of fulcrum, A; and if he is balanced ui 

 the center he can turn on the great center and fulcrum and roll 

 hirnseli in all ways; and, doing this, he rolls a great drive- wheel 

 ^d a circle of them; and in his turnings and changing he rolls a 



yj: 



,ball of circles around him. If he wants to hold a load that is 

 .crowding him, and stop it going down a hill, he throws his weight 

 ^l^ck of the canter, A, by bracing forward all of his legs. The more 

 ..Jtjie load crowds the more he will get the balance of leverage by 

 ., throwing his weight back of center. A, as is shown in cut No. 2. 

 . If lie is all right lie must be so he can throw liis weight always 

 ...around the great fulcrum, C, and perpendicular center-line, B. The 

 J^vers must be equal, as shown in cut No. 10 from center. A, to 



Ko. lO. 



r> B. If they are ho can rotate (D D line) both way; and all 

 ■ways to lino, E E, aroui.d the ^reat center," C, This whole busi- 



