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    Re: The lost expedition of La Perouse
    From: Alexandre Eremenko
    Date: 2005 Jun 9, 16:42 -0500

    I had the same impression from their broshure I have,
    though they did not say directly that they invented
    or introduced it
    and when. The broshure is of early 40-s if
    I remember correctly.
    
    The same company often advertized their "Patented infinite screw",
    which (as george explained to us) was a predecessor of the modern
    drum.
    
    Alex.
    
    On Thu, 9 Jun 2005, Fred Hebard wrote:
    
    > My recollection is that micrometer drum sextant was developed by Heath,
    > shortly after World War I.  I don't have documentation for this
    > recollection, however.
    >
    > Fred
    
    
    

       
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