capped with spun-heads so as to present a smooth and B', respectively. The local battery, required, one at each end of the O, is connected by wires, D and E, walk, and are known as the "up- □ —a_ _& with binding-posts, D', E'. The per" and "lower" machines. They / ~^~ a poles of the main battery,… … can also engage grounding-plates, giving the rope a finish-gloss. The DIAGRAM OF APPARATUS IN WHICH SOUNDERS ARE USED. top having been mitered between OO'. The grounding-plate, O', is con- the strands as closely as possible to nected by a wire, F2, with the the top, the sled is gradually forced…
Arc · Coal · Bituminous · Motor · Apparatus · Bituminous coal · Scientific American · German lloyd · Building edition · Horse power · Submerged electric · Soft coal · North german · Three years · Electric motor
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