A barometer worked by a sealed metal vacuum capsule instead of a mercury tube, usually set behind a round dial in a wooden wall case, made to read the weather in the hall, on deck or in the pocket.
The top sale on Sellingantiques for an aneroid barometer, in February 2026, was an Edwardian barograph with an added aneroid chapter ring, five-glass mahogany case, circa 1910.