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