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Of the Coulter. 22 will be found to be about 4 or 5 inches from the bottom of the furrow, though N draw C D perpendicular to A H I. Then, if the edge E F of the coulter makes an angle of about 45 degree: witt L M, ic will make an angle of a- bout 20 degrees with C D. There bez ing nearly the ſame quantity of earth cut by the part below N, as there is cut by the part above N, the coulter will be equally preſſed on each ſide of the line of draught, and will, in this re- ſpect, have no tendency to turn the plough out of the ground, nor into it. This poſition will therefore be the molt Proper, when the ſock is at the longeſt, and will admit of being changed, ſo as to bring the point of the coulter near (o the ſock; when this is ſhorter, while

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