Page:Willich, A. F. M. - The Domestic Encyclopædia (Vol. 4, 1802).djvu/201

175&#93; SWA thick at Ej but which decrease to 3 iiiches at F. In these bulls are fixed six iron cutting wheels, which are 13 incl^.es in diameter ; i: of an inch thick at the centre, for the reception of holes, containing the iron axis ; and which are of such a thickness from that part, as to admit of the edges being wcH steeled. Farther, such wheels are fixed by means of two bolts, that pass through the- bulls, having eyes at one end, for the motion of their axles ; the opposite extremi- ty being provided with tiuts and screws, which are sunk in the bulls, to prevent them from interfering with the weights that rest on theu^ j and the^•e are marked with the let- ters, L, L, L, I,, L, L, L, I,, in the respective figures above delineated. G, G, G, G, G, G, G, are seven thorles, or hollow pieces of wood, each being 3t inches in length, and hiclosing the bolt,M,M, while they serve to keep the bulls, C, C, C, C, C, C, at proper distances. These thorles consist of two parts, being connected by means of a cord or leather strap, that ad- mits of their being changed, when it becomes necessary to enlarge or diminish the cutting wheels : they may also be made shorter, or lon- ger, as the sward recjuims to be cut in larger or smaller pieces. M, M, is an iron bolt, that passes through two pieces either of wood or iron, seven inches in length, clear of the wood, which are supported by iron stays fixed to the trame ; and run through all the bulls, as represented at T, ('Fig. 3). — Such bolt ought to be very strong, as the draught of the horses there terminates, H,H, (Fig. 2, and 3), represents a wooden cylindei', termed a rock- ing-tree, which is seven inches in SWA [iy^ diameter, extends across the frame, and moves on two pivots, inserted in the latter ; one being fixed at each extremity. — This cylinder is not described in Fig. i, in order to convey a clearer idea of the frame : it is supported by an iron bolt, or piece of wood mortised into the frame (as delineated in the figures above referred to), that is eight inches in height, and to which six chains or ropes are attached by- hooks, at various distances; ac- cordingly as the cuts may be re- quired to be 6, 7, 8, or g inches asunder. Farther, the chains or ropes are joined to the end of eacl> bu;], in which tlie cutting wheels move; so that, when the roi king- tree is t'urned about by the lever I, all the bu'ls are, togeliier with their wheels, raised uniformly out of the ground, as delineated in Fig. 3 ; by which expedient the implf.ment may be turned from one pkics to another, w ithout any danger of straining the wheels. L, L, L, L, L, L, L, L, fFig. i. 2, and 3), are weights of iree- stone, which are 2d inches in length, and 6 inches in breadth ; the lower stone being 4 inches thick, and weighing about 56 lbs, ; the upper one is of similar dimen- sious, but 3 inches thick, and weighs about -i2 lbs. : these stones are- perforated with two holes, through which are inserted iron spike*, that are fixed in the bulls, with a view to keep them steady. — Mr. S. remarks, in his commu- nication to the Patriotic Society- above- mentioned, that the stone first described will be sufficient, when the ground is not very hard ; but, where it cannot be cut with- out great difficulty, the stone weighing 42 lbs. may be added; so that every ^^ heel may support a wer<rht