ces These devices were patented through the Scientific Ameri- ready for business. The trucks on which it is built are very are firmly staked in the ground, as shown in the engraving. can Patent Agency, the treadles under dates March 7, 1871, heavy and strong, and were cast especially for this plow.… … the windlass. On the point of this plow there To operate the device, the rope is to be an iron plate, steel attached to the windlass is _ pointed, 11 feet long and 4 feet slacked until the beam, E, is in- wide. This plate, of course, clined downward sufficiently to runs across the track, and only…
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