tercourses, but a stream 6 feet deepand 12 or 18 feet ean be but five or six men upon a span ata time, seeing wide will arrest the marching of troops if the usual the spacing of the hurdles. bridges have been destroyed, or if a passage at a spot The trestle has very great stability on account of… … at Arras, appreciated the merit of this invention, and feet. and a depth varying from 5 to 7 feet, it THOMPSON’S MEADOW LEVELER. special instruction was given in certain corps of the took 35 minutes to prepare the bridge, exclu- sive of the time necessary to cut the wood, army during last year. The…
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