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Tag "slide rules"
Scientific American
Issue: Dec, 1954
Posted in: Advertisements
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Posted: 03/19/2013
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BINARY CIRCULAR SLIDE RULE (Dec, 1954)

CALCULATIONS of all kinds can be easily solved on the BINARY CIRCULAR SLIDE RULE

This rule will quickly solve the simplest as well as the more difficult problems involving calculations in Arithmetic, Algebra and Trigonometry.

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  • Toronto: PS: Grampa died in 1972, by the way. So he puffed his way to 78 or so. Granny made it to 96: drinking and smoking... ` – May 17, 6:49 PM
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