Improved machine for sampling sea-water at depth Size:L: 90 x 60cm Two women on the left

Two women on the left wearing seaside fashions and the woman on the right wears a garden dress

1280x1030mm

The poet Charles Churchill is depicted as a bear in a clerical collar

Barrington stands in back view holding his glass

France's first woman racing driver

Improved machine for sampling sea-water at depth Size:L: 90 x 60cm Two women on the leftPlate 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