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19th Century Artificial Horizon

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Recent activity644 of 225492Hanging kerosene lampBarometric Altimeter - Keuffel & Esser Co.
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    Posted 9 days ago

    SpaceRockMan
    (8 items)

    Interesting item from the late 19th century. Made by Chas C. Hutchinson - Boston. It was used in conjunction with a sextant to determine location. When in a position that does not include a view of the natural horizon, one would use the artificial horizon to get a fix on a star - directly and as a reflection off of the black glass. Small spirit levels are used to establish the artificial horizon on the surface of the black glass. Simply divide the angle in half to get the equivalent of a sextant reading.

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    Comments

    1. dav2no1 dav2no1, 8 days ago
      Interesting piece...

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