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- This is a simple wheel
- Joe conducts a speed test between the Burroughs comptometer style
- Lightning adding machine
- The Ve-Po-Ad from the 1930s or so. This is episode 21 of my video series about
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Joe rediscovers a relic from long ago, his grandfather's For more Calculatober, check out my website! https://www.calaquin.com/2019/10/calculatober-day-14- The
Patented in 1921 by Russell Hook of Grand Rapids, Michigan, the
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