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    Re: Old style lunar (in expert hands)
    From: Fred Hebard
    Date: 2004 Dec 10, 22:32 -0500

    On Dec 10, 2004, at 10:20 PM, Fred Hebard wrote:
    
    > On Dec 24, 2004, at 6:49 PM, Kieran Kelly wrote:
    >
    >> Its only disadvantage on land is that it is somewhat larger and
    >> heavier than a sextant.
    >>
    >> "Precisely. A theodolite with hardwood tripod legs weighs about 4x
    >> times as
    >> much as a sextant. Eg I own a Wild T1a theodolite. The combined weight
    >> of
    >> instrument, carrying case and tripod is 12 kgs. The  Zeiss Yachtsman
    >> sextant
    >> and case which I use on expeditions weighs 2.8kgs.
    >>
    >
    > A Wild T1 might only weigh 12 kilograms, but the ones used in the 1840s
    > for the Survey of India were more on the order of 120 kilograms.
    >
    > Fred
    
    
    I should add that an 1800s sextant with stand was probably around 10 kg.
    
    
    

       
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