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Mercury Thermometer

No.94 Kew Observatory August 1853 (engraved on the bulb end of the instrument). -2-43 (engraved with a scale marked in tenths of a degree). No 94 (engraved above the scale at the top of the instrument). MANU Kew Observatory, January 1853 Kew, London, England DES after CELSIUS,Anders. 1742 Uppsala University, Sweden. DES after FAHRENHEIT,Gabriel,Daniel. 1714 ? Europe. This is a -2 to 43 degree cent…