11/06/2026
This miniature barograph by Richard Frères records changes in atmospheric pressure using a series of five bellows linked to a delicate recording arm, all housed within a beautifully made mahogany case.
The glazed front allows the mechanism to be admired without opening the case, while the compact size makes it all the more fascinating. Measuring just 7 inches wide, it packs an impressive amount of ingenuity into a remarkably small space.
So notable is this example that it even features in Philip Collins' reference book Barographs.
A charming and highly collectible scientific instrument from around 1920.