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    Re: Sextant Terms
    From: Nicol�s de Hilster
    Date: 2009 Sep 24, 22:41 +0200

    Just under two years ago I wrote [NavList 3546] on a suggestion by 
    Alexandre Eremenko [NavList 3512] that I could get hold of a pentagon 
    prism for my C. Plath from the still existing firm:
    > In the meanwhile I contacted C. Plath for the pentagon prism, I'll let you know what comes up.
    >   
    I did send them a mail then, but never got any reply, and forgot all 
    about it. Then last week I stumbled upon that sextant again, which was 
    in the most horrible state ever since, completely green and white from 
    oxidation (it had been well used for 30 years in the field and obviously 
    more used than cleaned). So I decided to clean off all the oxidation, 
    which took half a day, followed by another attempt to get that prism. 
    Mail again seemed not to arrive, so I then contacted them by phone. 
    "Yes, we still have those prisms" was the reply, but at �747,- not 
    really a part one would just buy to complete an old instrument. Now I am 
    thinking of getting myself a separate prism (if that can be obtained for 
    less than that) and build myself the fitting that is needed to attach it 
    to the sextant frame. For the latter I need an example and the proper 
    dimensions of an original. So I was hoping that some of you would have 
    such a prism in his collection and could give me the details needed to 
    make a replacement. Any suggestions for places to get a pentagon prism 
    at a reasonable price are very welcome as well (I found myself one firm: 
    http://www.fleige-optik.de/produkte.php?lang=uk&id=11).
    
    The instrument is now on my website, still not a beauty as I decided 
    only to clean and not yet to restore it: 
    http://www.dehilster.info/instrumenten/sextantgeodetic2/index.html
    
    Nicol�s
    
    
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