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Scientific American, Vol. 60, No. 9 (1889) (1889)
leaf 4
ial velocity 3,000 meters, while the distance being pivoted on the pawl, which passes through rope runs horizontally, as in case of its use on railroad of the cannons’ ranges is said to be 20 versts, or over 13 another arm connected by a link to a lever fulerumed cars, or such connection may be… … yet known is derived from the OLSEN’S SIGNAL BELL FOR MINES, ETC.’ © 1889 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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