The horse shown in Figs. 1 and 2 is to be preferred to the pit for light work. It stands close against a wall, prefei'ably under a window; the larger parts can be made of deal. Itis very light, and can easily be removed if desired. In Fig. 2, A shows the front of top of wheel horse and B the back, each being 1 in. square C D are the legs, 3in. square E E are two pieces connecting front and back of horse together, 2Mn. wide by 1 1/4in. thick. These are driven tightly into a mortise about halfway through B and pegged or screwed; the other ends fit fairly tight in a mortise going right through A, so that the whole front of horse, with legs, can be knocked backwards and forwards to accommodate hubs of different lengths. Two pieces P F, 2 in. square and 19 in. long with C-in. bolts, are nailed or screwed on top of wheel horse and hollowed out on top for nave to rest in. To strike a curve on front piece, open the compasses 2 1/2in., and for back piece 3 in. The nave is fixed with pieces of iron about liu. wide and |in. thick, dropping loosely over the bolts and spanning the nave at front and back, which they are bent to fit. A frame for a pit for making very heavy wheels would have to be a fixture; the front might be 7 in. wide in the centre, and taper on the inside to 3iin. at ends, thus forming a bow piece to allow for the dish of the wheel.

The timber for making the pit frame shown in plan, Fig. 3, should be 3in. or 4 in. thick, the pit being 2ft. 6in. deep.

The four mortises G are 1 5/8 in. square, and the ground should be cleared away underneath them so that the pieces shaped like Fig. 4 (which are about 22 in. long, 1 5/8 in. thick, and 4 in. wide at the top) may be knocked back from below. The inner surfaces of these holding pieces should be shaved out on the bevel, so that when driven in they come into close contact with the sides and top of the hub, thus holding it in place. These pieces (Fig. 4) take the place of the four thumbscrew bolts of the wheel horse.

Fig. 3. Wheelwright's Horse for Mortising Wheel Naves.