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    Re: Old Sextant on German money
    From: Robert Eno
    Date: 2007 Jan 27, 23:09 -0500

    I visited Germany about 10 years ago, and again a few years later. Of all
    the souvenirs I took back with me, guess which one I still have safely
    squirreled away?
    ----- Original Message -----
    From: "alex" 
    To: "NavList" 
    Sent: Saturday, January 27, 2007 2:40 PM
    Subject: [NavList 2132] Old Sextant on German money
    > Dear list members,
    > Many of you probably know that there is a picture of a sextant
    > on the famous German 10 DM bill dedicated to Gauss.
    > (Unfortunately, this money bill was removed from circulation with
    > the introduction of Euro. I saved a few of them, unfortunaly very
    > few, and until recently, some of these bills were traded on the
    > Internet, see, for example,
    > www.math.purdue.edu/~eremenko
    > and click on the "Portrait of Gauss".
    > There you can see the picture I am refering to in the rest of this
    > message.
    > (The face of the 10DM bill has a portrait of Gauss, together with the
    > graph of the Gauss Law (a.k.a. Normal Distribution, a.k.a. Bell
    > curve),
    > a very nice picture, and the correct formula).
    > The back of the bill has a very detailed picture of a sextant
    > (much better than most e-bay pictures:-)
    > and also a map of the triangulation Gottingen-Altona (Hamburg) that
    > Gauss
    > made.
    > I am mostly concerned with the sextant.
    > It is a double frame (=coumn frame) vernier sextant/pentant
    > probably of the late XVIII century. Notice: it does not have horizon
    > filters.
    > It has some strange horizon mirror adjusting device (Dollond?)
    > and something underneath the horizon mirror which I don't understand
    > what it is.
    > But the most curious feature of this sextant is the Index glass.
    > It looks like consisting of two pieces, the kind of an index glass
    > I've never seen before.
    > Can anyone answer what is this?
    > (There is no doubt that the artist who made this engraving had some
    > museum piece
    > in front of him, and tried to reproduce it as precisely as s/he
    > could).
    > Alex.
    > >
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