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Hydrometer
Kyan (possibly), c. 1800 - c. 1858
Hydrometer Float in a Case
Burnett (possibly), c. 1800 - c. 1858
Hydrometer
Kyan (possibly), c. 1800 - c. 1858
Kyan (possibly), c. 1800 - c. 1858
Burnett (possibly), c. 1800 - c. 1858
Kyan (possibly), c. 1800 - c. 1858