How do I read a mercury barometer?

Observe the height of the mercury column inside the glass tube against the engraved scale to note current atmospheric pressure. Rising mercury typically indicates improving weather conditions, while falling levels suggest approaching storms. Many instruments include a manual vernier scale and a separate thermometer to adjust readings for ambient temperature. Comparing the current reading to previous observations helps track meteorological shifts.

Were these instruments used at sea?

Marine stick barometers and specific pocket thermometers were standard equipment on nineteenth-century vessels. These pieces utilised gimbals to keep the instrument vertical despite the rolling of a ship. Specialised designs protected the sensitive glass tubes from sudden shocks and maritime humidity. Captains relied on these readings to anticipate coastal weather changes and gales.

How should I hang a stick barometer?

Mount the wooden case securely to a stable interior wall away from direct sunlight and artificial heat sources. Temperature fluctuations near radiators can affect the mercury and warp the timber housing. Ensure the instrument hangs perfectly plumb so the glass tube remains vertical and the internal components function correctly. Use appropriate wall fixings suited to the weight of dense hardwoods like mahogany or rosewood.

How do I identify the period of an instrument?

Examine the timber, dial design, and casework style alongside any signature engraved on the metal plate. Georgian pieces often feature plain mahogany stick cases, while Victorian examples introduce walnut, rosewood, and heavier carving. Makers frequently signed the brass scales, allowing you to cross-reference working dates. The presence of specific dial layouts, such as early wheel configurations or Admiral Fitzroy scales, also points to a distinct decade.

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Antique Mercury Scientific Instrument

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An antique mercury scientific instrument brings the precision of Georgian and Victorian physics into a room.

19th century

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19th Century Thermometer in Original Case

From Debenham Antiques Ltd

£350

FOR SALE

miscellaneous

Mahogany Barometer by Vecchio & Co of Shaftsbury

19th century

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Mahogany Barometer by Vecchio & Co of Shaftsbury

From Hatchwell Antiques

£1,250

FOR SALE

barometers

Mahogany Stick Barometer - James Gatty - London

19th century

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Mahogany Stick Barometer - James Gatty - London

From The Antique Clock Co.

£2,850

FOR SALE

barometers

Georgian Barometer, Prada of High Wycombe

18th century

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Georgian Barometer, Prada of High Wycombe

From Kembery Antique Clocks Ltd

£395

FOR SALE

barometers

Victorian Carved Oak Admiral Fitzroys Storm Barometer by Negretti & Zambra

19th century

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Victorian Carved Oak Admiral Fitzroys Storm Barometer by Negretti & Zambra

From Jason Clarke Antiques

£3,495

FOR SALE

barometers

Large Victorian Desk Thermometer on Serpentine Base by Negretti & Zambra London

19th century

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Large Victorian Desk Thermometer on Serpentine Base by Negretti & Zambra London

From Jason Clarke Antiques

£795

FOR SALE

miscellaneous

Luisetti of London, Early Barometer C.1785

18th century

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Luisetti of London, Early Barometer C.1785

From Kembery Antique Clocks Ltd

£675

FOR SALE

barometers

18th century

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Georgian Stick Barometer Circa 1830

From Frank Craig Antiques

£750

FOR SALE

barometers

Good Quality 19th C. Admiral Fitzroy Barometer

19th century

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Good Quality 19th C. Admiral Fitzroy Barometer

From John Howkins Antiques

£575

FOR SALE

barometers

19th century

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A Victorian Rosewood Mercury Barometer

From Kembery Antique Clocks Ltd

£325

FOR SALE

barometers

Listings feature mahogany, rosewood, oak, and walnut cases housing glass mercury tubes alongside bone, mother-of-pearl, and silvered brass components.

A Farmers Negretti & Zambra Stick Barometer

19th century

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A Farmers Negretti & Zambra Stick Barometer

From Kembery Antique Clocks Ltd

£625

FOR SALE

barometers

A George III Period Mahogany Stick Barometer

18th century

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A George III Period Mahogany Stick Barometer

From Christian Davies Antiques Ltd

£195

FOR SALE

barometers

19th century

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Victorian Mercury Mahogany Barometer

From Kembery Antique Clocks Ltd

£320

FOR SALE

barometers

Early 19th Century Mahogany Stick Barometer by Malacrida of Dublin

18th century

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Early 19th Century Mahogany Stick Barometer by Malacrida of Dublin

From John Beazor Antiques

£3,350

FOR SALE

barometers

Georgian Rosewood & Inlaid "Fagioli" of Clerkenwell London Mercurial Barometer

19th century

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Georgian Rosewood & Inlaid "Fagioli" of Clerkenwell London Mercurial Barometer

From S J Bean Clocks & Antiques

£795

FOR SALE

barometers

Mahogany Wheel Barometer by Molton of Norwich

19th century

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Mahogany Wheel Barometer by Molton of Norwich

From P A Oxley Antique Clocks & Barometers

£1,250

FOR SALE

barometers

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Antique Mercury Scientific Instrument

19th Century Thermometer in Original Case

Mahogany Barometer by Vecchio & Co of Shaftsbury

Mahogany Stick Barometer - James Gatty - London

Georgian Barometer, Prada of High Wycombe

Victorian Carved Oak Admiral Fitzroys Storm Barometer by Negretti & Zambra

Large Victorian Desk Thermometer on Serpentine Base by Negretti & Zambra London

Luisetti of London, Early Barometer C.1785

Georgian Stick Barometer Circa 1830

Good Quality 19th C. Admiral Fitzroy Barometer

A Victorian Rosewood Mercury Barometer

A Farmers Negretti & Zambra Stick Barometer

A George III Period Mahogany Stick Barometer

Victorian Mercury Mahogany Barometer

Early 19th Century Mahogany Stick Barometer by Malacrida of Dublin

Georgian Rosewood & Inlaid "Fagioli" of Clerkenwell London Mercurial Barometer

Mahogany Wheel Barometer by Molton of Norwich

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