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Some Members of theRoyal Society did with two different sorts of Instruments make divers Experiments for finding theProportions of theCompression ofAir under Water , in the Month ofJuly , atsheerness , in the mouth of the River ofMedway , at the time of high water, where the depth was then about 19 Fathom, and the proportion of the weight of the Salt-water to that of the same quantity of Fresh water, taken out of the riverThames , was as 41 to 42.

philosophical transactions of the royal society of london

A table shewing, to what degree air is compressible in sea water, at the depth of any number of feet from 1. to 33. feet or 5½ fathom, and thence for any number of 5½ fathoms, or 33. feet, to 324½ fathoms or 1947 feet-