A Geoge III thermometer and multiple-tube barometer, the break-arch case surmouned by three brass urn finials, the outer tube controlling the index fingers for the thermometer and barometers set against paper printed with pillars festooned with leaves, flowers and fruit and capped with Masonic signs, birds and human figures on the back board signed Manticha 1781

Details

A Geoge III thermometer and multiple-tube barometer, the break-arch case surmouned by three brass urn finials, the outer tube controlling the index fingers for the thermometer and barometers set against paper printed with pillars festooned with leaves, flowers and fruit and capped with Masonic signs, birds and human figures on the back board signed Manticha 1781
24½in. (62cm.) high

Lot Essay

Dominick Manticha an Italian imigrant whose exact dates are unknown, however his barometers tended to be of above average quality. The double-tube barometer was a combination of mercury and oil used alternately in the tubes and the level of the oil in the open right hand side tube indicated the atmospheric pressure, the lower the pressure the higher the oil rises in the tube. The spirit thermometer has farenheit scale.

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