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    Spherical Trig
    From: N S Gurnell
    Date: 2005 Apr 5, 15:08 -0700

    Re Bill's question about the angles in a spherical triangle.
    Sixty years ago the exams called "Principles for Second Mates" used to have a
    question:- "What is Spherical Excess?" I've forgotten the exact answer but
    someone might know. Old Timer
    
    
    
    
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