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A comment on Steinhaus Longimeter.

Re:Steinhaus Longimeter by kozak on Thursday March 22, 2018 @02:08PM (#16651057)
Also interesting is https://en.wikipedia.org/wiki/Opisometer
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Re:Steinhaus Longimeter by Someone on Saturday March 24, 2018 @08:42AM (#16666323)
That one is easy to understand. hettps://en.wikipedia.org/wiki/Planimeter is more interesting: trace the perimeter to measure an area.
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Re:Steinhaus Longimeter by cstaecker on Thursday March 22, 2018 @03:09PM (#16651675)
I got you: http://www.youtube.com/watch?v=ifKrwF47uP8
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Re:Steinhaus Longimeter by hammock on Thursday March 22, 2018 @06:24PM (#16653267)
It's like a small version of a Rolatape (used for measuring race courses etc)

http://www.rolatape.com/us/en/home/measuring-wheels.html

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