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Volkmann (19th century)

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  • Volkmann (19th century)

    Dear Biomch-L readers,

    Last year February and March, there was an extensive debate between, a.o.,
    Ed Grood and myself on the pro's and con's of Cardanic angles as mechanized
    in the Grood & Suntay `joint coordinate system', and the so-called `helical
    angles' as proposed by myself.

    During last week's second Mathematics in Orthopaedics symposium at the
    Oskar-Helene-Heim at the Free University in Berlin, I was told that a mr(s)
    Volkmann in Germany described this convention about one century ago.
    Unfortunately, I have up to now been unable to locate a reference, and I
    would be grateful for any help from the readership.

    Thanks in advance -- Herman J. Woltring, Eindhoven/NL
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