Two-day marine chronometer by John Arnold and Son (No 63)

Two-day marine chronometer by John Arnold and Son (No 63) (chronometer; instrument component) Two-day marine chronometer by John Arnold and Son (No 63) (chronometer; instrument component) Two-day marine chronometer by John Arnold and Son (No 63) (chronometer; instrument component) Two-day marine chronometer by John Arnold and Son (No 63) (chronometer; instrument component) Two-day marine chronometer by John Arnold and Son (No 63) (chronometer; instrument component)

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

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Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

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

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

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

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

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

Two-day marine chronometer by John Arnold and Son (No 63), with inner and outer cases

Details

Category:
Time Measurement
Object Number:
1879-31
Materials:
gold, coil (spiral object), chronological, springs (elastic objects), timer, regulating and equilibrium
type:
chronometer and instrument component
credit:
On loan from Charles Frodsham & Co. Ltd, London.

Parts

Marine chronometer by John Arnold and Son, 1787-1799

Two-day marine chronometer (No 63) by John Arnold and Son, Cornhill, London, 1787-1799.

More

Finding longitude at sea had long been a concern for navigators. Chronometers, first devised by John Harrison in the mid-1700s, kept a record of time at the Royal Observatory, Greenwich. When navigators compared this with local time at sea, determined from observations of the Sun or stars, they were able to find their longitude. John Arnold was one of Britain’s leading makers of chronometers at the end of the 1700s.

Measurements:
diameter: 120mm
height: 75mm
weight: 1.095kg
weight: 2.41407lbs
Materials:
brass (copper, zinc alloy) , steel (metal) , glass and wood (unidentified)
Object Number:
1879-31 Pt1
type:
instrument component and chronometer
Image ©
The Board of Trustees of the Science Museum, London