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Scientific American, Vol. 70, No. 2 (January 1894) (1894)

leaf 9

An illustration from Scientific American, Vol. 70, No. 2 (January 1894), 1894, leaf 9
et), gave winding, when the frictional wheel was released and pany exhibited a watch in a case of quartz crystal, a resistance for the pair of safeties of 52,830 pounds, or the watch wound within the space of a second. from Brazil, ground, polished, and all the work upon it 26,415 pounds each. In… … THE SKULL WATCH. passengers. At either end of these tunnels, and close to the riverside, vertical shafts have been constructed, an American workman being employed about two each 80 feet in diameter. In each of these shafts there years and a half in completing the work. The lower are to be six…

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