A George III mahogany bayonet stick barometer, by Thomas Blunt, late 18th century, with silvered plates marked in barometric inches with sliding adjustment above a large scale thermometer marked in Fahrenheit, inscribed T Blunt London, with moulded...

A George III mahogany bayonet stick barometer, by Thomas Blunt, late 18th century, with silvered plates marked in barometric inches with sliding adjustment above a large scale thermometer marked in Fahrenheit, inscribed T Blunt London, with moulded hemispherical cistern cover, 97cm high Note: Thomas Blunt is recorded by Banfield as working circa 1760 until he died in 1822, he became instrument maker to George III probably as recognition for the work done with the Portuguese scientist J.H. de Magellan in developing his new type of barometer. The 'bayonet' tube is a straight glass tube which is crimped/bent below the register plates. This allows the lower part of the tube to be concealed behind a panel or plate upon which a thermometer is often mounted, as with the present example. Please note Roseberys do not guarantee the working condition of barometers offered for sale.

This lot contains liquid mercury. If you intend to ship this overseas it is classified as hazardous cargo and will require additional declarations alongside specialist crating/packing. Prior to bidding, please contact your shipper or talk to our specialists for more information.
Please note that this barometer contains mercury