Warning Sign for Radium Sources  (ca. 1950s)
This variation of the radiation warning sign was specifically employed for radium. On the front side of the sign, Ra replaced the central circle, and on the back, the word RADIUM was used as a mnemonic for six protective steps. Bob Gallaghar told me that he was the one who developed this version of the radiation warning sign.

Museum Directory             Radiation Warning Signs       

Last updated: 07/25/07
Copyright 1999, Oak Ridge Associated Universities