File:Circular artificial mercury horizon.jpg
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English: Artificial mercury horizon in fitted leather case invented by Captain Christopher George, provisionally patented in 1868 (No.2624) and made by Cary & Porter Limited, London, England, 1895-1900. Consists of two black-lacquered steel mercury holders on three levelling feet, interconnected by a tube fitted with a stopcock. One is a storage reservoir with a valve to admit air and empty the mercury into the other, which is used for making observations and is fitted with a glass cover. Markings indicate it was supplied by the Hydrographic Office of the British Admiralty to the British Antarctic Expedition of 1901-1904 (Discovery Expedition). |
| Date | |
| Source | Downloaded from Science Museum Group at https://collection.sciencemuseumgroup.org.uk/objects/co56424/artificial-mercury-horizon-with-case-artificial-horizon-mercury Released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence according to the page. |
| Author | made by Cary & Porter Limited, London |
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| current | 05:21, 21 August 2022 | | 1,536 × 1,006 (63 KB) | Episcophagus (talk | contribs) | Uploaded a work by made by Cary & Porter Limited, London from Downloaded from Science Museum Group at https://collection.sciencemuseumgroup.org.uk/objects/co56424/artificial-mercury-horizon-with-case-artificial-horizon-mercury Released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence according to the page. with UploadWizard |
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