52 Of the Coulter.

óf the coulter is the more neceſlary, for the purpoſe of keeping the plough in the ground; becauſe, as we(hall ſce afterwards, there are other circumſtan- ees which alſo tend to throw the plougli out of the ground.

I would therefore teconimehd an in- clination, or rake, of abouc 45 degrees, as the moſt proper, and the moſt cóôn- ducive, to all the good purpoſes hither- to mentioned.‘The propriety of this poſition will be illuſtrated by conſider- ing figure ift. Let A H repreſent the fine of draught, making an an gle of 24 degrees, with L M, the bottom of the furrow. This line of draught is ſup- poſed to paſs through the centre of efftort of the plough. Let it cuc the

‘édge of the coulter in N. This point

w11}