Let us read from the book [Pocket Ref, Tomas J. Glover] knowing that the specific gravity (sg) of pure water is 1.00 (62.4 lbs a cubic foot), from whence all else is compared. Therefore the sg of a Babbitt is 7.28, dense little fellows, perhaps that is why they make such good ring bearers? Oh, wait, mistake there, babbitt being an alloy of tin with some copper and antimony, and not a Baggins Hobbit. Solid ice checks in at .92 sg (57lbs cubic foot) yet Garbage (? the group) is only at .74. Goose down, you'll be comforted to know, varies from an SG of .006 to .002, depending upon the quality, and a weight of .36 to .14 lbs per cubic foot. Despite opinions gained after the last muffin Bran's sg is only .16 (16lbs cu ft) but only a sadist deals in cubic feet of the stuff. 24 kt Gold checks in at 19.29 (1204lbs), not bad, but Iridium is where you want to anchor your boat with an sg of 22.16 and a weight of 1383lbs per cubic foot.

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