Sunday, August 8, 2010

Calculating without electricity

When going through old things today I rediscovered an old Brunsviga 15. An old mechanical calculator. It is bigger than a slide rule and also a little big heavier. The weight must be way over 10 kilograms.

As you can see it has been used. My children are usually amazed by the number of levers. And by the fact that the machine does a decent ring when turned through Zero...

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