Add to ORKGPatent for "provide a means by which the swinging blades are made to cut a uniform depth, and do as shallow hoeing as may be required even in rough ground, and also work very close to small plants; second, to provide such gearing and such connection between the driving-wheel and the oscillating blades that the blades maybe readily shifted from right to left to keep them over the row without having to move or change the course of the driving-wheel at the same time" (lines 14-24)