This paper provides a history of the radiation warning sign with a focus on the period from 1946 to 1948. It employs previously unpublished material from the University of California Radiation Laboratory's Health Chemistry Group, the memoirs of John Gifford, and an account by George Warlick. Also considered is an alternative version of the sign's origin described by Cyrill Orly.

中文翻译：

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辐射警告标志的历史。

本文提供了辐射警告标志的历史，重点关注 1946 年至 1948 年期间。本文采用了加州大学辐射实验室健康化学小组以前未发表的材料、约翰·吉福德 (John Gifford) 的回忆录以及乔治·沃里克 (George Warlick) 的记述。还考虑了西里尔·奥利描述的该标志起源的替代版本。