Folding Ruler, WikiMedia Commons - Image Page

Folding Ruler, WikiMedia Commons - Image details

https://img.wikinut.com/img/11x04rgppveih2w3/jpeg/0/Folding-Ruler%2C-WikiMedia-Commons.jpeg - 500px by 421px

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The thickness of a man's thumb, the measurement lengthwise of a girdle, the weight of a wheat seed, the capacity of a handful of flour, all of these measures are over a thousand years old.
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