Circular artificial mercury horizon

Författare/Upphovsman:

made by Cary & Porter Limited, London

Tillskrivning:

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Kreditera:

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.

Kort länk:

https://sewiki.info/b/af9c1

Källa:

Wikimedia Commons

Upplösning:

1536 x 1006 Pixel (64376 Bytes)

Beskrivning:

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).

Licens:

CC BY-SA 4.0

Licensvillkor:

Creative Commons Attribution-Share Alike 4.0