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Mercury Thermometer

Fastre aine a Paris 1850 (engraved on the bulb end of the instrument). 0-50 (engraved with a scale marked in fifths of a degree). MANU Fastre aine 1850 Paris, France DES after FAHRENHEIT,Gabriel,Daniel. 1714 ? Europe. This is a 0-50 degree mecury thermometer with a cylindrical bulb and a straight bore with no expansion cell. This instrument was possibly used by Kelvin in his studies of thermodynam…