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This library is built in the open.
If you spot an error, have a suggestion, or just want to say hello — we’d love to hear from you.

A circular diagram labeled 27. It consists of a circle with a single radius line drawn from the center to the right. Latin text is written around the circumference.
A circular diagram labeled 28. It consists of a circle divided into eight equal sectors by four diameters intersecting at the center. Latin text is written around the circumference.