How does a barograph work?

Stacked metal vacuum boxes expand or contract as air pressure shifts, moving a pivoted brass arm with an ink nib. This arm rests against a clockwork-driven paper drum that rotates once a week. The resulting line forms a continuous record of meteorological trends, showing rising or falling pressure over days at a glance.

Where were barographs placed?

Owners kept these instruments in libraries, hallways, or estate offices where guests could observe scientific progress. Their polished wood and visible brass made them suitable for display in domestic rooms. Portable versions also saw service in military contexts, aboard ships, or in specialised railway stations to log local weather conditions.

How do I read the charts?

Paper charts are marked with horizontal lines for pressure readings in millibars or inches, and vertical lines for days of the week. The ink trace rises as pressure climbs and drops as weather systems approach. A rising line generally indicates improving weather, while a falling trace points towards wind or rain.

How do I date an Edwardian barograph?

Edwardian instruments often feature cleaner mahogany cabinet lines, restrained inlay, and specific maker signatures active in the early twentieth century. Retailer stamps and style clues help narrow the decade of production. Internal clockwork components and paper chart styles also provide clues to the manufacturing era.

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Mahogany Barograph

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A mahogany barograph is a recording barometer housed in a glazed timber case, prized by collectors of scientific instruments for tracking atmospheric pressure.

1900 - 1920

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Miniature Barograph by Richard Freres

From The Antique Clock Co.

£1,950

FOR SALE

barometers

1900 - 1920

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Mahogany Cased Barograph

From Mytton Antiques - Jerrard Nares

£725

FOR SALE

barometers

1900 - 1920

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A Five Glass Barograph

From Chalfont Clocks

£1,500

FOR SALE

barometers

Antique WWI Art Nouveau Inlaid Mahogany Barograph & Barometer Dial & Drawer

1900 - 1920

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Antique WWI Art Nouveau Inlaid Mahogany Barograph & Barometer Dial & Drawer

From N Wilson Antiques Clocks

£1,950

FOR SALE

barometers

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Mahogany Barograph

Miniature Barograph by Richard Freres

Mahogany Cased Barograph

A Five Glass Barograph

Antique WWI Art Nouveau Inlaid Mahogany Barograph & Barometer Dial & Drawer

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