'Scientific researches! - new discoveries in pneumaticks! - or - an experimental lecture on the powers of air', by James Gillray, published by  Hannah Humphrey, published 23 May 1802 - NPG D13036 - © National Portrait Gallery, London

© National Portrait Gallery, London

'Scientific researches! - new discoveries in pneumaticks! - or - an experimental lecture on the powers of air'

by James Gillray, published by Hannah Humphrey
hand-coloured etching, published 23 May 1802
10 in. x 13 7/8 in. (253 mm x 352 mm) plate size; 10 3/4 in. x 14 1/2 in. (272 mm x 369 mm) paper size
Purchased, 1947
NPG D13036

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