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    Re: Halley's lunar knowledge.
    From: Frank Reed
    Date: 2007 Dec 02, 23:02 -0500

    Michael Daly, you wrote (to George):
    "Exactly how is what I wrote contrary to what you write?  There was no
    Nautical Almanac of reduced lunar data but there was raw data on lunar
    position.  That's what I wrote and that's what you wrote."
    It's a minor distinction, but you wrote that there were NO ephemerides, or
    at least that's what you appeared to be saying. George pointed out that
    there WERE ephemerides which were not as good as the later N.A. but still of
    some limited use for determining approximate longitudes. The existence of
    further raw data is of some interest but probably not for Halley's
    observations c.1700 (he had not yet accumulated enough data to make any
    difference by that date).
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