| Original Trefoil Warning Sign from Berkeley (ca. 1947) |
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| This warning sign, produced for use at the
Radiation Laboratory in Berkeley, uses a blue background. Quoting
a letter written in March of 1949 by Nels Garden who oversaw the
development of the trefoil radiation warning sign: "Here at Berkeley
the blue background color has come to be recognized as an indication of
the presence of radioactivity wherever it is painted on waste can lids, or
other contaminated equipment, even floor areas or bench tops in special
cases." For more information, go to the Radiation Warning Signs
page and click on the Info Button.
Donated by George Warlick |
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Last updated: 07/25/07 |