1801.] On the Sward-Cutting Machine, 3

(one is ſufficient) to ſtrengthen the bolt M, to-be hooked on the centre of it, and joined to the frame by a nut and ſcrew.

The grooves, in which the cutting wheels run, may be covered below at the hinder part with a plate of thin black iron, ſix in- ches long, three inches broad, having a flit in it where the wheels run, to prevent(if found neceſlary) any graſs, weeds, or ſmall ſtones, from filling the grooves, and clogging the wheels, the form of which is ſeen at the letter z.|

To the frame, as ſeen at No, 1, are fixed(for a double-horſe ſward-cutter) three ſhafts, as in a waggon, of ſuch length, ſtrength, and diſtance from one another, as any workmen may think proper.

For a ſingle- horſe ſward-cutter(which has only four cutting wheels) a pair of ſhafts are uſed, and may make the two hides of the frame without any joinings. The width of the frame, in proportion to the double-horſe ſward-cutter, is as four to fix.

It is recommended for a double-horſe ſward-cutter to have eight bulls and wheels, that when it is uſed to reduce hard cloddy ſummer fallow, or land for barley, before the laſt furrow, or even after it, the whole weight, 42 ſone, employed in ſward- cutting the ſiffeſt land and tougheſt ſward, may be applied to the eight bulls then at ſix inches from one another: the four ſtone weights to be applied to ſix of the bulls, and two’ of the three ſtone weights to each of the additional bulls, which it is theught will prove a ſufficient weight for the purpoſe, and will effectually prevent a clod, at any time, of more than ſix inches broad, from eſcaping being broke to pieces.

In the ſame manner, a fingle-horſe ſward-cutter may have ſix bulls for the abové-mentioned purpoſe; the 28 ſtone bélonging to it divided thus: the four ſtone weights to four' of the bulls, and two of the three ſtone weights to each of the additional bulls. It was thought better to be rather minute here, than trouble the perſon employed in uſing the ſward-cutter with any calculations.

That the inſtrument may come as cheap as poſlible to the public, the inventor is of opinion, that the expence of the two wheels and the iron axle(which is conſiderable) may be ſaved, by joining ſtrongly to the frame at S,- No. 3, a piéce of wood with a littie curve at the extremity of it, reſembling the foot of a ſledge, formerly much uſed in Scotland, to carry in the corn from the field; the part of it reſting on the ground being kept 18 inches(the half diameter of the wheels) from the frame, by a ftrong ſupport of wood.

As the two outer bulls next the frame are apt to get under it, ſo as to prevent the cutting wheels from being taken out of the ground, a thin ſlip of iron fixed to the inſide of the frame, nearly oppoſite to the back cnd of the bulls, of convenient length, will b found nceceſlary,