Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 65
one or twoloops being used, according to the size of platform required. Theloops are kept in the middle of the yard by a chock on each side ofthem. It will be observed, that only four of the casks can be immersedat one time, and the object of the inventor in using twice that num-ber, is to permit… … Fig 2 shows another modification of this raft. It is composed ofthree spars, lashed together crosswise at the middle, and braced upby means of the ropes//. To each end of these spars* is attachedan empty cask, or a cork fender, to give the requisite buoyancy. Ifcasks are used, they should be…
Science · Patents · Meteorology · Technology
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