46 Of ihe Coulter.

This conſtruction has alſo been uſed with the coulter Ro farther advanced than the ſock; but in this caſe it has been thought an advantage to place it 2 very little more to the left, but ſill PAa- rallel to the ſide of the plough. But ic has been found, on trial, that it was UII better to advance the coulter be- íore the ſock.

It may be proper here to obſerve, that a plough conſtructed as above di- rected, makes a furrow conſiderably different from that made by a plough of which the lower point of the coulter projects ſo far to the land ſide. This will be illuſtrated by conſidering figures Sand 9. In figure 8. AB repreſents che coulter of figure 5. EK is the ſec- tion of the mouldboard, where it cuts

the