Aiton’s Encyclopedia

A Practical Reference Library in Five Volumes — keyed from the public-domain original

ABCDEFGHIJKLMNOPQRSTUVWXYZ

Home · Letter R · Radius

Radius

. See Circle

Volume IV · Aiton’s Encyclopedia

← Radium All “R” entries Raffia →

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Aiton’s Encyclopedia (1910) is in the public domain; this digital edition © 2026 PhotoOpAI.