About Slide Rules
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Scan day: 09 February 2014 UTC
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Description: Explains how to use the different scales to multiply and divide.
No more than thirty years ago, slide rules were everywhere. Unlike many instruments, instead of being steadily improved by the new electronic technology, they were completely wiped out; sharing the fate of mechanical cash registers and clockwork watches. It seems that few people today know how to use a slide rule; most of my contemporaries who learned at school have forgotten.
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