176] S W A •wreight of pSlbs. that has been ' found fully adequate to the cntiiii^ of the stiifest land, nnd the hnni- cst sward, on which experiments have hitherto been made with the implement : — he farther observes, that caii-iron, if it were not too expensive, would be preferable to stone. I, (Fig. 2 and 3), is ale'erlive feet long, which should be made of good, tough ash ; "and is con- nected with a sliding rope fasten- ed to the back part of the frame ; so that, when the roching-tree is partly ttirne<l round by the lever, and the cutting wheels are consf - quently raised three or four inches above the surface of the land, the rojje is tixed to it, by throwing a loop at the extremity of such rope over the pin R, {Fig. 2, and 3), at the distance of three feet four inches from the end of the lever I. Thus, all the wheels are kept above ground, till the Sward-cutter is turned ; wlien, on removing the loop from the pin, the rope or chain ^lips towards the frame, and the lever is gmdually returned to its former position, as appears in Fig. 3} so that the cutting wheels are restored to their first situation, by the weights tixed to the bulls. P, P, {Fig. 1), are small iron bolts, having hooks at one end, in order to strengthen the bolt M, M, and being fastened to the frame by nuts and screws. The hinder part of the grooves may be covered below with a thin jrfate of iron, which is six inches in leiigtb, three in breadth, with a slit in the part where the wheels njove; in order to prevent such grooves from being filled, and conse- quently the wheels from being clog- ged or impeded with grass, weeds, or small stoues. I'hc torm of such SWA plate, together with the slit, is dc- luieated in the small figure marked with the letter i. The machine represented in Fis;. I, is furnished with three shafts, resembling those of a waggon, and which are designed for a Lkmlle- horse Strard-mtier : they may he made of such length, strength, and proportion, as the workman may think proper. Mr, Sandilands recommend* an implement of this size to be provided with eight bulls, and an equal number of wheels 5 so that, when it is de- signed to reduce hard chddy sum- mer fallows, or to prepare land for barley, either leforc, or after the last furrow, the whole weight (amounting to forty-two stone, or 5S.S lb<i.) may be applied to the bulls, which should in this case be six inches asundt-r : hence the stones, weigliing 5t) lbs. each, are to be laid on six of these bulls ; aivi two of those, weighine 42lbs. each, on the two additional ones ; the whole forming a weight, which is conceived to be fully adequate to the purpose, and which will effec- tually crush every clod of a bicadth exceeding six inches. A Single-horse Sward-cutler is furni.^bed only with four cutting wheels, dnd one pair of shafts > the latter of which may, without requiring any joinings, form the two sides of the frame. Its width, compared with that of the imple- ment designed to be drawn with ^«'o horses, is in the ])roportion of four to six j and, if it be intended for cutting tough soils, it may be furnished with sir bulls, and 2S stoue weight, being divided in the following manner, namely : ther 561b. weights (that is, the four larger stones) being applied to four of tlis bulli : and two of the 42 Ibi. weigh; 9,
