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Hydrometer Float in a Case
Burnett (possibly), c. 1800 - c. 1858, hydrometer, NG-MC-868
Hydrometer
Kyan (possibly), c. 1800 - c. 1858, hydrometer, NG-MC-870-2
Burnett (possibly), c. 1800 - c. 1858, hydrometer, NG-MC-868
Kyan (possibly), c. 1800 - c. 1858, hydrometer, NG-MC-870-2