220 Dibbling and Drilling Macline.[Oect.

the corn,&c. will be liable to jamb between the mortise or groove and the sìde of the segment, therefore the form of the recess will be like the bowl of a tea-spoon, but smaller,

or otherwise, as may be found necessary for the quantity of

seed 10 be delivered. This recess being placed just within the thickness of the front of the botrom of the hopper, it will completely shut up the mortise or groove, until it is thrown open by the playing of the lower part of the tumbler against the bars as the machine is moved forwards, which will be at sìx inches intervals, more or less, agreeably to the portion of those bars which strike against the lower part of’ the tum- bler, force it up in order for the bars to Pass it; which must always be the case while the lower part of the tumbler is a little longer than the radii, as the bars revolve round its axis within the lower end of the tumbler. To the lower end of the tumbler is fixed a prong on a joint, which will only open from the underside of the hopper s0 as lo project perpendi- cularly downwards, and there be stopped by means of its Joint revolving no farther round the lower part of the tum- bler; therefore this being about two inches long, will strike the bars, but, wben doubled under the hopper by means of the joint, the bars will pass freely by it without disturbing the tumbler, and consequently not let out any of the contents of the hopper, which is necessary to preserve the contents of the hopper from waste, by rolling the machine the reverse Way to that when at work. L have called it above a prong, because this litile swivel is fixed to the outside of the tumbler, with two ears, through which, and the bottom of the tum. blers, is a little pinion, which it swivels at the lower end, which 1s about two inches or more, if necessary, is divided 80 as to make a prong above described; by which means the hole which the dibble makes will be filled Up, and the end covered over, as the dibble will deposit the grain between the prong, which is drove into the ground at the same instant the bars lift the lower part of the tumbler and prong, because the dibble 1s fixed to the Upper part of the segment; and consequently the segment being on a centre, the dibble must be fixed into the earth in the same proportion as the bars lift the lower ends, or more, as may be found necessary, by fix- ing ane or the other, more or less, from the centre. The bind part of the dibble is hollowed sufliciently to convey the grain,&c. to the ground; the lower part is pointed and the front about the thickness of a coulter, because it has two motions, being struck into the ground and passing forward at the eame time. The upper end 1s placed in an eye of iron, about as much above the joint as the point 1s below, fixed to the outside of the hopper, through which it passes freely