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beam, A B, laid in the liollow between them,with its upper surface a little above that of thecasks. These two rafts, each of 22 casks, arethen placed together, and connected by cross-beams. This raft is about 21 feet long, andG feet 8 inches broad.

For raft fig. G, the 18 casks are placed intwo rows, end to end, and lashed to a framewhich has three long beams, AB, CD, EF;the middle beam, CD, resting on the ends ofboth rows of casks. This raft is four feet nineinches broad, and about 19 feet eight incheslong.

The 10 casks in raft fig. 7 are placed in tworows, side to side, and lashed to a frame, A BCD,much like the former; or to the cross-piecesAB, DC, attached to the central beam. Thisraft is about 17 feet long, and four feet eightinches broad.

The five casks in raft fig. 8 are placed sideto side, and lashed to the frame A C 1) B: theseform a raft float about 14* feet long, and 4 feet5 t‘ inches broad.

In this manner combinations to give equalityof buoyancy should be made; and when raftsare unavoidably formed of casks of differentsizes, the baulks must be blocked up, on thelower rafts, to obtain a level floor.