44 



Report on Trials of Plows. 



side is beveled oif towards the cutting edge, where it is ahout 

 one-eighth of an inch thick throughout the length of the edge. 



The Bridle. — Fig. 44 is a plan, and Fig. 45 is a corresponding 

 elevation of the bridle, and of the manner of its attachment to the 

 beam, where a is part of the beam, b the cross head, and c c the 



JFlff. 4.5. 



.^iff. 44-. 



tails of the bridle, with their arc heads, d, embracing the beam on 

 the two sides ; e is the joint bolt on which the bridle turns for 

 adjustment to earthing ; /is the temper pin or bolt, and by insert- 

 ing it into any one of the holes in the arc heads, and passing 

 through the beam, which is here perforated for the purpose, the 

 bridh? is held in fmy required position. The draught shackle g 

 is held upon its place upon the cross head b by the draught bolt 

 h passing through both parts, and the cross head being perforated 

 with five or more holes ; the bolt or shackle can be shifted from 

 right to left, or from left to right, for the proper adjustment of 

 the landing of the plow. To the shackle is appended the swivel 

 hook i, to which is attached the main draught bar or swiiiijle tree 

 of the yoke. 



The Land Side. — Figs. 46 and 47 are illustrations of the IuikI 

 side ; Fig. 46 being an elevation of the body of the plow, repre 

 sented in the working positions, but with the extremities cut off 

 The point of the share and the heel rest upon the base line at a 

 and b, and the lines of the sole lying between these form the very 

 obtuse angle, which obtains in the sole of this plow ; a c is the 

 share, and d b is the sole shoe ; e is the land side plate, and / g 

 is !i p;irt of the beam. The lines a d and d b, together with tlie 



