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Published at 561 × 596 in A tale of $n$ cities
A diagram like the previous one, this time without labels or colours, emphasising how the widths of different "edges" are different. The circles with the most total edge width are the biggest.

Circle radii are proportional to the city’s population; route widths are proportional to the number of pen pals.

Clare (like gare) is a Chalkdust editor. In her spare time, she’s an assistant professor at Durham University. She likes Skittles, probability, and making the magazine look more like Cosmo.
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