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    Re: Question about old sextant
    From: Robert H. van Gent
    Date: 2018 Jan 26, 10:02 +0000

    Hi,

     

    The depicted instrument is actually an octant.

     

    Such instruments and their use are described detail in

     

       https://global.oup.com/academic/product/sextants-at-greenwich-9780199532544

     

    Rob van Gent

     

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of German Diaz
    Sent: 25 January 2018 19:09
    To: Gent, R.H. van (Rob)
    Subject: [NavList] Question about old sextant

     

    Hello my friends of Celestial Navigation,

    I have been consulted by the National Museum of Colombia about a sextant used by the Scientific Mission contracted by Francisco Antonio Zea and used for his meteorological studies, in 1823. It is described as being of English manufacture, assembly of wood and metal, 41 x 33.5 x 6.2 cm

    I want to ask for your help if someone knows the operation of the part that I highlight in the image of the sextant and if someone has more knowledge about the history of this sextant.

    Thank you
    German Diaz

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