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    Re: Certificates and arc excentricity
    From: Frank Reed
    Date: 2007 Oct 24, 22:20 -0400

    Alex, you wrote:
    "Simms (of the famous Troghton and Simms) wrote several papers and a
    book where this is the main subject. This was in the late 1850-s."
    
    Did you know you can download the whole book from Google Books? It provides
    extensive details on arc error measurement and correction. To find it, go
    here:
     http://books.google.com/advanced_book_search
    and search on 'Simms' and 'sextant' setting the maximum publication date to
    '1900' (e.g.). This will return "The Sextant and its Applications" by Simms
    from 1858 as the top result. You may notice that the paper by E.J. White
    also turns up further down in the search results.
    
     -FER
    
    
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