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    Re: Easy Lunars in 1790
    From: Fred Hebard
    Date: 2006 Apr 27, 15:55 -0400

    On Apr 27, 2006, at 3:38 PM, Ken Muldrew wrote:
    
    > Note: I haven't corrected the data for temperature or pressure (his
    > altitude above sea level was about 3250 ft.).
    >
    > Ken Muldrew.
    
    Ken,
    
    Depending upon the temperature, pressure can add a fairly significant
    correction, especially at 3250 ft.  Here at 2000 ft one almost drops
    off the bottom of the Nautical Almanac correction chart.  Did
    Thompson record barometric pressure?  I would think he might have
    done this for height above sea level determinations.  If so,  I would
    expect he also would have recorded temperature.
    
    Fred Hebard
    
    
    

       
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