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    Infrared sextant
    From: Noell Wilson
    Date: 2014 Aug 24, 07:33 -0700

    Interesting old sextant on eBay:

     
    HISTORIC MACNEIL ALL WEATHER SEXTANT Ca1932 - CASED EXCELLENT CONDITION

    Built by Hughes, it apparently concentrated infrared energy and allowed sun shots on overcast days. 

    Regards

    Noell

       
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