ee

ON#T HES PLOUGH. a§

ground, and deviate towards the ploughed land, where the refiftance is lefs, becaufe the foil is loofer. To counterbalance this tendency, the coulter is fet inclining a little to the left*; fo that at the point it rifes fomewhat above the plane of the left fide, and is one exception to what was formerly ob- ferved, that this fide is all in one plane; and thus the coulter, both by moving in firmer ground, and by being inclined to the plane of the left fide of the plough, communicates a more fteady and uniform motion to the whole. Now, the fame inclination would not have produced the fame effe€ts, if the fituation of the coulter had been at or near the mould-board; becaufe the obftruGions, in that cafe, ating on a fhorter lever, would produce correfpondently greater- quences, and for this reafon difturb more the motion of the whole machine.

The other particular formerly mentioned,

was

* Suppofe theline AF, fig. 7. to reprefent the plane of the left fide of the plough, F the point of the fhare or fock; then the point E may exprefs the lower end of the coulter placéd to the left of the plane.,