stoeberhai

stoeberhai club

Posted: 24 Mar 2010


Taken: 25 Mar 2010

1 favorite     1 comment    216 visits


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slide rules


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Slide rules

Slide rules

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 stoeberhai
stoeberhai club
Hi, Ester. In times before calculator was invented, you had these slide rules to solve multiplications, divisions, trigonometric functions and logarithm.
14 years ago.

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