30 Of the Coulter,

which appears to me to be the moſt proper, and then ſhow its advantages, by comparing it with the common form,

The beam ſhould be 4} or 43 thick between the coulter-hole, and the hin- dermoſt ſide of the ſheath, and ît ſhould be 47 or 5 deep at the ſame place. At the fore end, the thickneſs ſhould be 27x» and the depth 32. It may have a curve of 6 inches up and down, which the ploughmen call the redde of the plough.

Inſtead of tapering the beam equally atr both ſides from the place of the coul- ter, as repreſented in fig. 2. No. 2. I make the beam ſtraight on the furrow- ſide, as in fig. 2. No. 1, and taper it only on the land ſide, both ways from the place of the coulter. The taper

backwards