Machine for sampling sea-water at depth Size:XS: 40 x 30cm Ray Galton and Alan Simpson

Ray Galton and Alan Simpson on tour for new ideas

An English extract of the letter was printed in Philosophical Transactions of the Royal Society

volume 1 (London

Scene in the Hanover Square Rooms

Machine for sampling sea-water at depth Size:XS: 40 x 30cm Ray Galton and Alan SimpsonPlate 11 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 has twintrapdoors within a weighted brass cylinder. Original: pencil on paper. 1819