Thermometer

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Differential thermometer. 2 x 12" thermometers (one with blacked bulb and one with silver bulb). Mounted in vacuum tube on a wooden base.

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ID:	AST0774
Collection:	Astronomical and navigational instruments
Type:	Thermometer
Display location:	Not on display
Creator:	Newman, John Frederick
Date made:	circa 1850
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 460 mm; Diameter: 40 mm
Parts:	Thermometer Base (AST0774.1)