ceptacle for the sulphate of cop- its wheels, can swing around horizontally, independ- er. This plow is said to be very light in the draft ; per;andc are the two other supports, bearing ently of the beam, so as to turn a corner readily. electrodes connected with A on either side, d is the The… … zinc. If the zincs are pure, the coupling pin, E, which HUNT'S IMPROVED PLOW. the battery may be main- couples the axle and beam phate of copper, in small charges, every two or three days, and keeping the sulphate of zinc sufficiently dilute—say from 25° to 85° Baume’s hydrometer. nut, G, which…
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