London, South Kensington
5 December 2001
A silvered brass balloonist's barometer, late 18th century
The cylindrical tube with alcohol thermometer (replaced) and with metric scale calibrated 35-80cm., components stamped A 21, hanging from a wooden backboard -- 45½in. (116cm.) high
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It has been suggested that this barometer may have been made by Jesse Ramsden for the European market. The style of Vernier is of kind last used at the end of the 18th century.
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