2 On the Sward-Cutting Machine.[Jan,

iron, ſeven inches long, clear of the wood, ſupported by iron ſtays, fixed to the frame, and through all the bulls, as at T, No. 3. It reguires to be frong;, as the draught of the horſes terminates there.

H H, No. 2 and 3, a cylinder or ſcgment of wood, ſeven inches diameter, called a rocking-tree, which goes acroſs the frame, and moves on the pivots fixed into it, one at each end, ſupported by an iron bolt, or piece of wood morticed into the frame, eight inches high, as appears in No. 2 and 3, to which ſix chains or ropes are fixed by hooks, at different diſtances, 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; ſo 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 raiſed 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 eaſe, without any danger of ſtraining the wheels.

N. B. The rocking-tree is not delineated in No. 1, in order that the plan of the frame may be more cafily underſtood,

LL, No. 1, 2, 3, are weights of freeſtone, 26 inches long, fix inches broad, the under one four inches thick, the upper one of the ſame dimenſions, and three inches thick, which will weigh(according to the gravity of the ſtone) about four ſtone the under, and three the upper, all of them having-two holes in them, through which iron ſpikes, firmly fixed in the bulls, paſs, in order to keep them fſteady.

When the ground is eaſily cut, the under ſtone, of four ſtone weight may anſwer; when more difficult, the other ſtone of three ſtone weight may be added, ſo that every wheel may have ſeven ſtone weight upon it, which has been found ſufficient for the ftiffeſt land and tougheſt ſward the machine has ever been tried on. Caft iron weights will anſwer fully and better, but are more expenſive, which the inventor wiſhes by all means-to avoid.

The lever I, No. 2, 3, which ought to be five fect long, muſt have a fiding rope‘on it, fixed to the back part of the frame, ſo that when the cutting wheels are all taken out of the ground three or four inches, by the rocking tree’s being turned partly round by the lever, the rope is then fixed to it, by putting a loop at the etd of the rope over the pin R, No. 3,(it ought to be placed three feet or four inches from the extremity of the Jever L} which keeps all thé cutting wheels out. of the“ ground till th chíne is, andthen, by moving the loop of the pin, 1t ſlips back tov e frame, and the lever is gently let back to its place, as in No. 2, by which‘the cutting wheels are put into their former poſture, by the weights fixed on the bulls in which thev run. The lever may be made of good tough aſh. PL, No, xr, a{mall bolt of iron, with a hook on one end of it,