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    Charts
    From: Doug
    Date: 2009 Jan 19, 16:00 -0500
    Does anyone know of a website that has scans of old charts of a coastal region on Long Island, NY?  I'm only talking about going back 40 to 70 years in order to see when a ship wreck is first shown on a chart.
     
    Doug
     
     
     
    In a message dated 01/19/09 15:20:37 Eastern Standard Time, george{at}hux.me.uk writes:

    The attached picture should answer Clive's worry about the difficulty of
    reading a 24-hour clock. This clock has stood at a gate of the Royal
    Observatory, Greenwich, for over 150 years. It's actually an early electric
    "repeater" from a master clock.

    In my view, the only problem about reading it is in the multiplicity of Is,
    Vs, and Xs that are called for by the use of Roman numerals. If ordinary
    numerals had been used, it would have been much clearer.

    It relates, a bit, to earlier discussion, in that the moment of passing 24
    hours must have been changed, at some date, from midday to midnight.
    Probably when Greenwich time changed, at the start of 1924.

    Note that at the very top mark, the dial is not labelled XXIV (=24), but 0,
    something that all our 12-hour dials could usefully follow.

    George.

    contact George Huxtable, at  george{at}hux.me.uk
    or at +44 1865 820222 (from UK, 01865 820222)
    or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.


     

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