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Scientific American, Vol. 64, No. 3 (January 1891) (1891)

leaf 3

An illustration from Scientific American, Vol. 64, No. 3 (January 1891), 1891, leaf 3
wide will arrest the marching of troops if the usual the spacing of the hurdles. and forwardly curved fingers adapted to clear the drum The trestle has very great stability on account of bridges have been destroyed, or if a passage at a spot and its cutters of any earth which may cling thereto. its… … at Arras, appreciated the merit of this invention, and feet, and a depth varying from 5 to 7 feet, it THOMPSON'S MEADOW LEVELER. took 35 minutes to prepare the bridge, exclu- special instruction was given in certain corps of the sive of the time necessary to cut the wood, army during last year. The…

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