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Maths Object: Correntator

Here’s another one of my favourite maths objects: the Correntator. It’s a simple mechanical tool to add up amounts of money. I bought it for about a tenner (new money) at a market.

This video is extremely shonky. Blame my phone, which can’t bring itself to record for more than 250 seconds at a time.

More information about the Correntator.

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