IMPLEMENTS OF HUSBANDRY

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machine is drawn forward, the beam-coulter makes a cut inthe middle of the drain, and the other two a sloping cut oneach side, so that, as the plough advances, the share cuts upthe earth below; and being thus cut from the firm ground, itis raised gradually by the inclined plane, and by the fore-endof the mould-board following in the track of the middle coul-ter : the soil so raised is turned to each side by the mould-boards, and laid on the firm ground, leaving the drain quiteopen.

A mole plough has been lately constructed by Mr Wilson,an ingenious mechanic, at Coldstream in Berwickshire, andis likely to be of service in draining land free from stones.

SECT. VII.

ROLLERS.

1 he Roller is an implement frequently made use of in hire*bandry, and it is the most powerful machine ever yet invent-ed for breaking hard clods expeditiously, and also for smooth-ing the surface of land, either when in tillage, or when laiddown in grass for hay. There are several kinds of rollersused in Scotland , some of which are made of wood, some ofstone, and others of cast metal. But the one which is easiestprocured consists of a wooden axle, having two or three rowsof spokes placed into it, according to its length. Upon theextremity of these spokes are fixed felloes, in the form of acart-wheel; and on the felloes are fastened planks or boardsof wood all round, forming a cylinder. The only essentialdifference in these rollers is, their length, diameter, andweight; for though, in some cases, a short, small, light