Improved machine for sampling sea-water at depth Size:L: 90 x 60cm 1280x1030mm

1280x1030mm

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Improved machine for sampling sea-water at depth Size:L: 90 x 60cm 1280x1030mmPlate 12 from the paper 'On the specific gravity, and the temperature of sea waters, in different parts of the ocean, and in particular seas; with some account of their saline content', by Alexander Marcet, Philosophical Transactions of the Royal Society, vol. 109 (1819), pp. 161 208. The instrument was made by John Newman of Lisle Street London and used by William Edward Parry's 1819 1820 expedition Baffin Bay aboard HMS Hecla. Original: pencil on