Improved machine for sampling sea-water at depth Finish:none Moorfields and London Wall

Moorfields and London Wall

Illustration from A tour in Scotland and voyage to the Hebrides

With keys to the buildings and streets

British Championship match at Windsor Park

Improved machine for sampling sea-water at depth Finish:none Moorfields and London WallPlate 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