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    Re: W. & S. Jones Helborn, London box sextant tangent table
    From: Robert H. van Gent
    Date: 2022 Mar 8, 10:22 +0000

    Hi Tony,

     

    Did you try to download the pdf (see link at the bottom)?

     

    Or does the e-rara webpage not open for you?

     

    The full title is

     

    William Jones, Geometrical and graphical essays containing a general description of the mathematical instruments

    used in geometry, civil and military surveying, levelling, and perspective : with many new practical problems … by

    the late George Adams (London, 1797).

     

    The 1803, 1807 and 1813 editions are also available on Internet Archive

     

      https://archive.org/search.php?query=%22Geometrical%20and%20graphical%20essays%22

     

    I usually prefer the e-rara scans as they are of better quality – the Google book scans are to be avoided as the fold-out plates are usually not scanned. However, sometimes there is nothing else, then a Google scan can be useful.

     

    rvg

     

    From: NavList@fer3.com <NavList@fer3.com> On Behalf Of Tony Oz
    Sent: 08 March 2022 03:30
    To: Gent, R.H. van (Rob) <R.H.vanGent@uu.nl>
    Subject: [NavList] Re: W. & S. Jones Helborn, London box sextant tangent table

     

    Dear Robert, the link does not work for me.

    Could you please give the name of the book - to look for it elsewhere?

    Thank you in advance.

    Warm regards,
    Tony
    60°N 30°E

       
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