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    Re: I couldn't resist!
    From: John Huth
    Date: 2012 Oct 20, 09:02 -0400
    Here's an article that I'm trying to dig up.  Owen is my colleague who has the largest private collection of ephemerides from this period.    I think this will answer most questions posed here:

     The accuracy of ephemerides 1500-1800, by Owen Gingerich
       
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