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The boxwood cistern has a leather bottom, which the brass screw underneath the cistern cover pushes against when turned clockwise. This pushes the mercury up the tube until the vacuum is filled, which then enables easier transportation. This system was invented by the eminent clockmaker Daniel Quare though his exact design is not recorded.
The carcass is pine veneered in walnut with solid walnut mouldings and cistern cover. An unusual feature is the pierced wooden tube cover running from the top of the cistern cover to the bottom of the scales. The brass engraved and silvered scales are protected by a glazed brass door.
“The baroscope is an instrument well known to most men; few gentlemen being without one of them, though few of them understand its right management and use..” Richard Neve, Baroscopologia, 1708.
|Height||100.00 cm||(39.37 inches)|
|Width||13.50 cm||(5.31 inches)|
|Depth||7.00 cm||(2.76 inches)|