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    Re: Practical Haversine Use
    From: Fred Hebard
    Date: 2021 Nov 14, 16:16 -0500
     and into the 1970s.  The HP 35 was introduced in 1972, and I believe Wikipedia is correct in calling it the world’s first scientific pocket calculator.  I had to use 5-place logarithms to reduce some physical chemistry lab data in the fall of 1972, the HP 35 being too expensive for this undergraduate..  Those 5-place logs were hard on my tired brain at the end of that semester.

    Fred Hebard



    On Nov 14, 2021, at 13:45, Frank Reed <NoReply_FrankReed@fer3.com> wrote:

    By the way, these "10+" logarithms were simply "standard logarithms" for many practical users from the late 18th century and into the 1960s. 

       
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