EE
THE DRILL PLOUGH. Éos
cylinder about an inch and a balf long, and half an inch wide, be cut out from the extremity of each hole next to the end B, and let this piece of the tin cylinder thus cut out be fixed by à few fprigs on the wooden cylinder exa@ly in the fame place, which it covered before it was cut out of the tin one, by which contrivance, when the tir: cylinder 1s afterwa:ds pufhed forwards by: turning the fcrew at its end, fo as to contract the excavations of the wooden cylinder be- neath, the bare parts of the wooden cylinder will exift an inch and. à half from the extremities of the excavations next to the end B, and thus will not pafs under the brufhes, and in confequence no fmalk feeds can lodge in them.:
2. Some kind of iron ftaple fhould be fixed at eaëh end of the feed. box on the outfide, which when the hinder part of the carriage is raifed up by the perfon who guides it, might catch hold of the two iron fprings at din Plate X. Fie. 1. for the purpofe of fufpending the coulters out of the ground, and conneëting the hinder part of the machine with the fhafts before; that in turning at the ends of the lands, or in pafling from or to the field, the wheels may not fwerve at the joint+, at the centre of the axle-tree,. but may follow in the fame line with the fhafts.
3. The feed-box muft alfo be fupported on upright iron pins pañi-- ing through iron ftaples, with a lever under the end of it next to the wheel 77, Plate XI. Fig. 3. for the purpofe of eafly lifting that end of the feed-box about am inch high, to raife the teeth of the iron cog-wheel on its axis out of the teeth of the correfpondent iron wheel on the nave of the carriage-wheel.
4 The conftruétion of the coulters, which make the drills, and of the rakes, which again fill them, after the feed is depofited, and alfo of the hoes, are not here delineated; as they are fimilar to thofe {o often defcribed or ufed by Mr.Tull and his followers.
5. When the lower ends of the feed-flues are placed through the holes in the coulter-beam, Plate I. Fig. 1. at nine inches diftance
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