Drawings, improved machine for sampling seawater at depth by [TP and LFM] Plate 12 showing an instrument for sampling seawater at depth made by John Newman of Lisle Street, London and used by William Edward Parry's 1819-1820 expedition to Baffin Bay [between Baffin Island, Nunavut, Canada and Greenland] aboard HMS Hecla. The work is inscribed with publication and plate details. Not signed, but the plate bears two sets of initials. Royal Society stamp verso. Subject: Geodesy / Hydrography Published in Philosophical Transactions as part of paper titled 'On the specific gravity, and temperature of sea waters, in different parts of the ocean, and in particular seas; with some account of their saline contents' by Alexander John Gaspard Marcet. Read to the Royal Society on 20 May 1819. [1819]