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Low Tech

Woodworking engineer Matthias Wandel built a 6-bit wooden adding machine driven by marbles.

More info (and more gizmos) at his website.

May 25, 2018 | Science & Math · Technology

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Futility Closet is a collection of entertaining curiosities in history, literature, language, art, philosophy, and mathematics, designed to help you waste time as enjoyably as possible.

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