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    Re: Eclipse of August 21st, 2017
    From: Don Seltzer
    Date: 2017 Aug 22, 15:19 -0400

    With all the warnings about using only ISO approved glasses to view the sun, I 
    wonder how they made filters for sextants 200 years ago.  I assume that they 
    provided sufficient protection or historical records would show an extremely 
    high rate of blindness among young naval officers.
    
    Don Seltzer
    

       
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