1806.] Dibbling and Drilling Machine. 219

collar to work in, which will be either cut oùt of the ends or metal collars fixed to them. The square of the axle should project sufficiently through the ends of the roller to admit of fixing securely to them shafts or a handle, similar to a garden- roller or wheel-barrow, if a hand machine; but if made larger for a borse, it will be’ necessary to have shafis for the horse to draw in; in either case it must be s0 securely fixed on the square of the axle, that the roller shall turn freely about in the collars above described, by which means the anléibecónes a! fixtire:to the'shafts or’ handle.” On this square of the axle is hung a hopper or trough, within side the before described hollow roller, of such dimensions as will hang freely, without any part of it being s0 close as to rub, or at any time touch, the bars or inside of the heads of the rollers.| The mouth of this hopper or trough may be made to any convenient size within the hollow roller; but the bot- tom must be about two inches wide, and of nearly the iength of the roller, made of iron or wood,&ec. s0 that it is suffici- ently strong to sustain the continued shocks of the bars, which will strike-the bottom of the tumbler, which is fixed in the bottom of this hopper or trough. I call it a tumbler, because, as the bars strike the lower end of the upper„part which is fixed in a mortise or groove in the hopper or trough, it 1s tumbled out of the mortise by means of being fixed through the middle by a pin at the bottom of the hopper or trough. The upper part within thé mortise 1s the segment of a cirele, about four inches diaméter and about one inch and a half thick, or any other dimensions, as may be for the convenl- ence of sowing large or small graïn, or pulse,&c. This segment is s0 cut at the bottóm of the hopper, that the cen- tre is fixed just below the bottom, outside the hopper, for the convenience of changing the segment agreeably to the sìze of the grain or pulse which is to be s0wn; for the seg- ment of this roller, working within the groove or mortise which is cut through the bottom of the hopper, s0 that the seed is agitated by the tumbler on its own axis, will conse=- quently never open any part of that groove or mort1se, which will prevent the grain or pulse within the hopper from drop- ping out. And in order that it shall deliver or tumble out the same quantity at every time, the bars of the roller strike against the lower part of this tumbler, or small segment of à roller, which is fixed at the under side of the hopper. Tiere must be cut out of the upper edge of the seg!aent next the front of the hopper, a recess, of a proper size for that pur- pose, something in the shape of a bean, which must be sunkK within the segment; at the same time taking care to preserve the edges of the thickness of the roller up to the segmenul;

PA

E j À y