Report of the Trials of Ploughs, Harrows, Sfc, at Hull, bll 
as well as the abnqjt character of the front portion of the mouldboard, and 
the nearly vertical position of the disc which effects the brcakinn; of the soil. 
When the latter is dry and tolcrahly lisjht the efl'cct is very perfect, but when 
the soil is damp and tough very little effect was produced. One can imagine 
great advantage in preparing vetch land for turnips, or where tixrnips have 
Figs. 72-75. — American Disc Plough exMbiied hy Mellard's Trent 
Foundrij Company, No. 4322. 
Fig. 72. 
Fig. 73. 
Fig. 12. Shows an elevation of the body, witli the socket for shaft of disc, marked a. 
„ 73. Plan of share-front board, and castings to receive the disc supports. 
„ 74. Disc and arm. 
„ 75. Castings on body to receive arm of disc. 
