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bered 1,2, and 3, on the trestle A, on each side;

1 and 3 being provided with pole-hooks suf-ficiently long to reach the first pair of hangingtackles F. Let three men, numbered 4, 5, and6, follow; 4 and 6 carrying a traverse. Then,

1 and 3 will catch the hanging ends of the firsttackles, give the falls to number 2, the hooks tonumber 5, and, receiving a traverse from 4 and 6,pass it under the floor cables, and hook it tothe tackles F, F. Numbers 1 and 3 then haulout the traverse to its place, with two or threeplanks lashed to it, proceeding in this way fromC to C, until the bridge is completed. When allthe tackles and traverses are in place, but slack,the whole should be nicely adjusted, to retain thesuspension cables in their position of equilibrium.The temporary floor is then removed, the plankslaid across the floor cables, and lashed to thoseon the outside.

The weight of cordage and appertenancesof a rope bridge of this description, for a riverabout 130 feet wide, is about 12,490 pounds.When infantry are marching over, under a frontof three men, ranks three feet distant from eachother, the bridge will have to sustain about 120men. Their weight, each taken at about ISOpounds, is about 21,600 pounds, which added to12,490 pounds, gives 34,090 lbs. the weight tohe borne by six 3 inch cables, forming the floor

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