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Scientific American, Vol. 43, No. 2 (1880) (1880)
leaf 4
vers, Quebec, Canada. The object of R, nor with N. The slide valve, R, rests in this position for these improvements is to facilitate the working of the gates forty seconds, that is, until’ the minute is completed, when fe to furnish a water way or sluice under the floor another displacement, as… … block wedge. This invention Fig, 3,STREET CLOCK, ceiving clocks, shown in Fig, © 1880 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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