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    Re: H.O. 229/249: publication dates
    From: Greg R_
    Date: 2011 Mar 24, 10:03 -0700

    And according to Gary's website, "H.O 249 was first published in 1951".
    
    https://sites.google.com/site/fredienoonan/discussions/refraction-correction-to-sextant-observations
    
    --
    GregR
    
    
    On 3/24/2011 8:33:45 AM, Frank Reed (frankreed{at}historicalatlas.com) wrote:
    
    > When were these first published? Thanks.
    > -FER
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