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The barometer scale is fitted with a vernier gauge enabling the increments of change in barometric pressure to be easily read to 1/100 of an inch. An unusual feature is the prominent hygrometer complete with a setscrew to recalibrate the straw pointer. Hygrometers were not sophisticated scientific instruments as they consist of a beard of wild oat which coils tight when dry but unwinds when the moisture content of the surrounding air rises. First described by Robert Hook in 1663 the hygrometer is not found on domestic instruments much before 1760, the scale of 0-30 is a fairly arbitrary and it's inclusion is probably primarily one of decoration and curiosity.
The main body of the barometer is veneered in mahogany with some boxwood stringing and inlay. To further enhance the feature of the hygrometer it is framed by four inlaid fan spandrels. These attractive motifs were popular in the early 1800's and the shaded affect was created by applying hot sand on the area to be darkened. Also in vogue at this period was the classical architectural pediment, here finished nicely with an ivory finial.
|Height||109.00 cm||(42.91 inches)|
|Width||13.50 cm||(5.31 inches)|
|Depth||6.50 cm||(2.56 inches)|