λ A RARE MAHOGANY AND BRASS BALLOONING OR MOUNTAIN STICK BAROMETER BY THOMAS JONES EARLY 19TH CENTURY of cylindrical shape, the screw-off cap top revealing a suspension ring, above a sliding cover revealing a silvered register with a manually operated vernier scale, with an ivory thermometer, inscribed 'Thos Jones Charing Cross', above an ivory registered 'Tempe of the mercury, correction of the expann of mercury & mean dilation of glass, heights of the mercurial column in inches, neutral point 30.340, capacity 1 / 56, temperature 52 degrees', in a leather travelling case 94cm high
λ A RARE MAHOGANY AND BRASS BALLOONING OR MOUNTAIN STICK BAROMETER BY THOMAS JONES EARLY 19TH CENTURY of cylindrical shape, the screw-off cap top revealing a suspension ring, above a sliding cover revealing a silvered register with a manually operated vernier scale, with an ivory thermometer, inscribed 'Thos Jones Charing Cross', above an ivory registered 'Tempe of the mercury, correction of the expann of mercury & mean dilation of glass, heights of the mercurial column in inches, neutral point 30.340, capacity 1 / 56, temperature 52 degrees', in a leather travelling case 94cm high
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
