Artificial bubble horizon

Paget type, artificial bubble horizon Artificial bubble horizon Artificial bubble horizon Artificial bubble horizon Artificial bubble horizon Artificial bubble horizon

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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

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

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Paget type, artificial bubble horizon
Science Museum Group
© The Board of Trustees of the Science Museum

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

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

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

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

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

Paget type, artificial bubble horizon, designed and made by Henry Hughes and Son, City of London, England, 1905-1910. Mounted behind the horizon glass of a sextant it consists of a curved bubble level in right-angle tube containing a prismatic lens with cross-wires and adjusting screws. In use the observer views the bubble via the prism and aligns the cross-wires, which replaces the horizon. It can only be used during daytime with sufficient light, an improved version, from around 1914, was fitted with electric illumination for night-use.

Details

Category:
Astronomy
Object Number:
1911-219
Materials:
metal, glass and plaster of paris
type:
artificial horizon - bubble
credit:
British Admiralty (Hydrographic Department)