Barograph clock by Alexander Cumming

Made:
1766 in London
maker:
Alexander Cumming
Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document) Barograph clock by Alexander Cumming (barograph; clock; chart  - graphic document)

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Science Museum Group Collection
© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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© The Board of Trustees of the Science Museum

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Barograph Clock by Alexander Cumming, 1766, with used chart. From 1814 onwards, this clock was used by the famed meteorologist Luke Howard to make systematic observations that are among the world’s first urban climate studies. It incorporates a mercury barograph mechanism for measuring changes in air pressure, which are recorded on the circular paper chart around the outside of the dial. The clock had been made in 1766 by the noted London clockmaker Alexander Cumming, three years after he completed a similar device for King George III, a prominent patron of science. Two tubes of mercury are concealed in the fluted wooden columns visible inside the glass trunk door. An ivory cistern and a wood and ivory pen cage run in ivory rollers connecting the pressure-measuring mechanism to the recording dial. The clock is housed in an exuberant carved mahogany case believed to be by the esteemed cabinet-maker Thomas Chippendale.

Barograph clock with used chart made by Alexander Cumming (1731 or 1732-1814), London, England, 1766. Consists of compensated pendulum regulator clock with mercury barograph, operated by clock mechanism. Commissioned and used by manufacturing chemist and meteorologist, Luke Howard (1772-1864).

Details

Category:
Time Measurement
Object Number:
1973-565
Materials:
mahogany (wood), glass, brass (copper, zinc alloy), silver plated and paper (fibre product)
Measurements:
overall: 2180 mm x 630 mm x 290 mm, 100 kg
type:
barograph, clock and chart - graphic document
credit:
Acquired with Art Fund support (with a contribution from The Wolfson Foundation)

Parts

Barograph clock by Alexander Cumming

Barograph clock by Alexander Cumming

Barograph clock made by Alexander Cumming (1731 or 1732-1814), London, England, 1766. It consists of a compensated pendulum regulator clock and a mercury barograph mechanism for measuring changes in air pressure, which are recorded on the circular paper chart around the outside of the dial. Two tubes of mercury are concealed in the fluted wooden columns visible inside the glass trunk door. An ivory cistern and a wood and ivory pen cage run in ivory rollers connecting the pressure-measuring mechanism to the recording dial. The clock is housed in an exuberant carved mahogany case believed to be by the esteemed cabinet-maker Thomas Chippendale. Originally used by Cumming himself, the barograph clock was purchased in around 1814 and used by manufacturing chemist and meteorologist, Luke Howard (1772-1864).


From 1814 onwards, this clock was used by the famed meteorologist Luke Howard to make systematic observations that are among the world’s first urban climate studies. The clock was made in 1766 by the noted London clockmaker Alexander Cumming, three years after he completed a similar device for King George III, a prominent patron of science.

Measurements:
overall: 2180 mm x 630 mm x 290 mm, 100kg
Materials:
wood (mahogany) , glass , brass (copper, zinc alloy) , ivory , steel (metal) , paper (fibre product) , silver plated and mercury
Object Number:
1973-565 Pt1
type:
instrument component , clock and barograph
Chart for Cumming barograph clock, British, 1766

Chart for Cumming barograph clock, British, 1766

Used paper chart for barograph clock made by Alexander Cumming, London, England, 1766.

Measurements:
overall: 1 mm 430 mm, .015kg
Materials:
paper (fibre product)
Object Number:
1973-565 Pt2
type:
chart - graphic document