eel THE ADVOCAES OF I [NUMBER 1%. VOLUME VIL] ee THE Scientific American, CIRCULATION 16,000. PUBLISHED WEEKLY … was crushed down so far that its upper sur- two separate horizontal pulleys, ff, and then drum in any direction, the rope, a, will bring The accompanying engraving is a perspec- face was not more than one gnd_a-half inches round the head of tle scow to the one side, as over a windlass roller, W, to…
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