Description
Church of St John at Hackney
two angels in the sky
Cheapside by Bow Church
Two astronomical observations of a comet [now designated C/1742/C1] seen at St
Machine for sampling sea-water at depth Bay of Venice Church of St John atPlate 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
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