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cord, which allows them to be readily changed, 

 when the cutting wheels require to be kept at more 

 or lefs diftance. 



The iron-bolt M. No. i. goes through two pieces 

 of wood or iron, feven inches long, clear of the 

 wood, fupported by iron ftays, fixed to the frame, 

 and through all the bulls, as at T. No. 3, it re- 

 quires to be ftrong, as the draught of the horfes 

 terminate there. 



H. H. No. 2 and 3, a cylinder or fegment of 

 wood, feven inches diameter, called a rocking-treey 

 which goes acrofs the frame, and moves on the pivots 

 fijced into it, one at each end, fupported by an iron- 

 bolt, or piece of wood morticed into the frame, 

 eight inches high, as appears in No, 1 and 3, to 

 which fix chains or ropes are fixed by hooks, at dif^ 

 ferent diftances, as you want your cuts, at 9, 8, 7, 

 or 6 inches from one another, and are joined to the 

 end of each bull, in which the cutting wheels run 5 

 fo that when the rocking tree is turned about by the 

 lever I. fixed in the middle of it, all the bulls^^ 

 with their cutting wheels, are raifed out of the 

 ground at once, as in No. 3, by which means the 

 machine may be turned, or moved from place to 

 place with great eafe, without any danger of ftrain^ 

 ing the wheels, 



