Tropical sunshine recorder Mk IIIA by Casella

Made:
1959 in London
maker:
C F Casella and Company Limited
Sunshine recorder Mk IIIA by Casella

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

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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

License

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

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

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Sunshine recorder Mk IIIA by Casella
Science Museum Group
© The Board of Trustees of the Science Museum

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

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

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

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

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

Tropical sunshine recorder Mk IIIA, Campbell-Stokes type, MO [Meteorological Office] serial no.479/59, made by Casella, London, 1959.

This device records the duration of visible sunshine. The glass orb focusses the Sun's rays and burns a line onto a recording card. Each card is marked with hourly intervals and can record up to a day of sunshine. It is the 'Tropical' version, designed for latitudes between 0 and 45 degrees North or South.

This type of recorder was invented by John Francis Campbell in 1853 and modified in 1879 by Sir George Gabriel Stokes, leading to the design name 'Campbell-Stokes. This particular design is manufactured to the specifications of the British Meteorological Office.

Details

Category:
Meteorology
Object Number:
1995-820
Materials:
brass, glass and card
Measurements:
overall: 233 mm x 195 mm x 175 mm, 5.44 kg
type:
burning-glass sunshine recorder
credit:
Meteorological Office, Berkshire