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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Finding longitude in the 12th century
From: Gary LaPook
Date: 2012 Aug 31, 21:20 -0700
From: Gary LaPook
Date: 2012 Aug 31, 21:20 -0700
I remember my father showing me a comptometer in his office in 1954. It could multiply and divide! It was amazing! It had all of these little windows showing numbers and it whirred for a while. seehttp://upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Comptometer_Model_WM.jpg/220px-Comptometer_Model_WM.jpg I believe that the calculations for HO 214 where done using LOG TRIG tables and the comptometers were used for adding and subtracting the logs since you don't have to multiply or divide logs for navigation calculation (but for exponentiation and finding roots, you do.) gl --- On Fri, 8/31/12, Lu Abel <luabel@ymail.com> wrote:
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