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    Re: Bygrave Scale Lengths
    From: Brad Morris
    Date: 2013 Jan 31, 06:45 -0500

    Hi Ronald

    Will there be a revision II to your paper?  Certainly you have gathered plenty of new information in the last few years to justify a revision.

    Thanks to Gary's persistence on the issue, I think we also have consensus on the 'official direction' on what to do in the cases of declination close to zero and hour angle close to zero or ninety.  Use the F-Tafel!  In the explanation of the truncation of the scale ends, this alone warrants a new revision to the paper.

    Best Regards
    Brad Morris

    On Jan 31, 2013 3:43 AM, "Ronald van Riet" <ronald{at}van-riet.nl> wrote:

    First to answer Gary's question about the scale length of the HR2: as my paper shows, it is about the same as that of the HR1, even though the item itself is much larger. This is mainly due to the numbers being horizontal to a vertical scale, therefore the windings of the scale are farther apart than on the HR1.

    But what I find expescially interesting in these pictures is the Werknummer of the HR2: 83989 which according to the black book should have been allocated to an HR1. I have just seen a picture of another HR2 with Werknummer 83995 which is in this same block of Werknummer.

    I am attaching a photocopy of the relevant page in the little black book: there is no mistake about it, it clearly says HR1!

    So this entire batch of 50 may have been HR2s, makes one wonder about the other entries in the same book.

    Please keep those HR1/MHR1/HR2 Werknummer coming!!!

    Ronald
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