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    London Science Museum
    From: Alexandre Eremenko
    Date: 2012 Jun 26, 09:20 -0700

    I recently visited the Science Museum in London.
    It has a Troughton dividing engine in a permanent exposition,
    but currently they also have two exhibitions:
    "Mathematics" and "Computers". In "Mathematics" exhibition they
    have many interesting items, I mean analog computers, various
    plotting devices and two other dividing engines, one of them WORKING!
    (What else can you display under the title "Mathematics" in a museum:-)

    The other dividing engines are another later one by Troughton,
    and one by Cary (London), which was used until 1920 and still working:
    in the museum display, you press a button, and an electric motor makes
    the parts of the engine move.

    Other very impressive things are differential analisers: pure mechanical
    devices for solving differential equations. It is amazing to see a high
    precision clockwork
    devices of such size:-)

    Alex.

    P.S. The very first Ramsden's dividing engine described in Bill Morris
    blog is in Smithsonian Institution
    in Washington DC. But I was never able to see it. Apparently it is not on
    display.
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