Description
by Joseph Roques (1772-1850)
Air pumps allowed experimenters to create a partial vacuum in the glass bell at the top of the device by pumping air out using the handle
The plate is inscribed below: 'Plate VIII
The Irish Land Bill had just been introduced in the Upper House by the Earl of Cadogan
' By this time
American Goldfinch directing by Joseph Roques (1772-1850)
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