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    Re: beginner
    From: Willem Piccer
    Date: 2005 Oct 2, 12:36 +0200

    Just as an input for this discussion: I took my boxsextant to the beach to
    see if it was of any use and within no time I knew
    it is useless
    
    Willem Piccer
    
                        ----- Original Message -----
    From: "george huxtable" 
    To: 
    Sent: Wednesday, September 28, 2005 1:37 AM
    Subject: Re: beginner
    
    
    > At 15:06 16/09/2005, Fred Hebard replied to a question from Willem Piccer
    > about box sextants:
    > >Willem,
    > >
    > >My understanding is that the replicas are not accurate and are not
    > >suitable for any sort of measurement whatsoever.
    > >
    > >The box sextant was an angle-measuring device used by explorers on
    > >land.  It was used as one might use a transit or theodolite, where it
    > >was impractical to cart those heavier instruments --the box sextant
    > >could be carried in a pocket.  I don't believe the accuracy was high
    > >enough for use at sea, except perhaps in emergency situations, more on
    > >the order of degrees than arcminutes.
    > >
    > >Fred
    > >
    > >On Sep 16, 2005, at 9:59 AM, Piccer wrote:
    > >
    > >>I followed the dicussion on the plastic sextant with a lot of interest.
    > >>
    > >>At home I have a replica of what is called a " box" sextant.
    > >>I never tried to use it, but can somebody tell me if this is a serious
    > >>instrument?
    > >>
    > >>The only reference I have found is on the website of Stanley, London :
    > >>they sell  the replica's
    > >>
    > >>Many thanks
    > >>
    > >>Willem Piccer
    >
    > ============================
    >
    > In listmember Peter Ifland's lovely book, "Taking the Stars", a couple of
    > pages are devoted to box sextants, with several photos of
    > these  instruments. Here's some of what he says-
    >
    > "The so-called box sextant brought an entirely different approach to a
    > small, lightweight, easily portable angle-measuring instrument. The box
    > sextant was designed specifically for explorers and surveyors and enjoyed
    > popularity through most of the nineteenth century. All the essential
    > elements of a complete Hadley sextant- an index mirror, a horizon mirror,
    > colored-glass filters- were contained within two circular brass plates
    only
    > 3 1/2 inches in diameter ... It is unlikely that the box sextant was much
    > used at sea except perhaps for small boats and yachts..."
    >
    > I recall a warning, some years ago on the "sextants" mailing list, to the
    > effect that "Stanley, London" was a label frequently attached to modern
    > instruments intended as replicas, which give the appearance of earlier
    > instruments, but are quite unsuitable for measurement, being made without
    > attempting to achieve any sort of accuracy. Willem's box sextant may or
    may
    > not come into that category; he should regard it with some suspicion.
    >
    > George.
    > ===============================================================
    > Contact George at george@huxtable.u-net.com ,or by phone +44 1865 820222,
    > or from within UK 01865 820222.
    > Or by post- George Huxtable, 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13
    > 5HX, UK.
    >
    
    
    

       
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