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    Re: The repeating reflecting circle.
    From: George Huxtable
    Date: 2005 Jan 16, 22:05 +0000

    Thanks to Alex for helping me to locate the volume on mechanical
    instruments by Frederick W Simms. I've ordered it up at the library, but
    haven't seen it yet.
    I had been looking at the wrong Simms; William, who wrote the book on the
    sextant that I referred to. Alex asked how many pages that had. Can't
    remember precisely, but it's a slim volume, about 100 pages at a guess.
    Looking at Fred Simms' other publications, he is clearly a mining engineer,
    and maybe his instruments have a mining connection. In which case, perhaps
    it's possible that to him, a dipmeter might be a device for measuring the
    dip of an underground seam, rather than a device to measure the anhedral
    angle between two opposite horizons. Just a thought.
    contact George Huxtable by email at george@huxtable.u-net.com, by phone at
    01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy
    Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.

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