A RARE GEORGE IV MAHOGANY CASED JAMES SIX PATTERN MAXIMUM AND MINIMUM RECORDING THERMOMETER
J. SOMALVICO AND COMPANY, LONDON, CIRCA 1825
The glazed rectangular case enclosing a tight U-shaped tube incorporating a downward return column to the centre connected at the top to the left, the U-bend filled with mercury and the remainder with spirit incorporating a part filled bulb to the top of the left-hand column, the right-hand column with FAHRENHEIT and REAUMUR scales opposing conforming but inverted scales to the left, with the column itself also including a metal rod 'float' for recording the minimum temperature of exposure, the upper margin inscribed R.J. EATON and signed J. SOMALVICO, MAKERS, LONDON, ('maximum' float not visible).
49cm (19.25ins) high, 6.5cm (2.5ins) wide, 3.8cm (1.5ins) deep.
The firm of Joseph Somalvico and Company are listed with numerous entries in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as working from several addresses including 81 Holborn, circa 1795-25; 37 Charles Street, Hatton Garden, circa 1820-40; 2 Hatton Garden 1840-67 and 16 Charles Street 1868-99.
The design of the present lot was invented by the British Scientist, James Six, in around 1780. The inscription for 'R.J. Eaton' probably relates to the original owner.
A RARE GEORGE IV MAHOGANY CASED JAMES SIX PATTERN MAXIMUM AND MINIMUM RECORDING THERMOMETER
J. SOMALVICO AND COMPANY, LONDON, CIRCA 1825
The glazed rectangular case enclosing a tight U-shaped tube incorporating a downward return column to the centre connected at the top to the left, the U-bend filled with mercury and the remainder with spirit incorporating a part filled bulb to the top of the left-hand column, the right-hand column with FAHRENHEIT and REAUMUR scales opposing conforming but inverted scales to the left, with the column itself also including a metal rod 'float' for recording the minimum temperature of exposure, the upper margin inscribed R.J. EATON and signed J. SOMALVICO, MAKERS, LONDON, ('maximum' float not visible).
49cm (19.25ins) high, 6.5cm (2.5ins) wide, 3.8cm (1.5ins) deep.
The firm of Joseph Somalvico and Company are listed with numerous entries in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as working from several addresses including 81 Holborn, circa 1795-25; 37 Charles Street, Hatton Garden, circa 1820-40; 2 Hatton Garden 1840-67 and 16 Charles Street 1868-99.
The design of the present lot was invented by the British Scientist, James Six, in around 1780. The inscription for 'R.J. Eaton' probably relates to the original owner.
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