Admiral R. B. Berry, chief of Los Angeles Civil Defense Committee and Phil Ortha examine vacuum "air sweep" device atop City Hall, which will be used for testing whether radioactivity reaches Los Angeles from the impending A-Bomb tests in Nevada. The device draws in possibly contaminated air through a filter trap. Dated October 16, 1951.
Berry, R. B Ortha, Phil Los Angeles City Hall (Los Angeles, Calif.) Radioactivity--Measurement Admirals--United States Men--California--Los Angeles Women--California--Los Angeles City halls--California--Los Angeles Downtown Los Angeles (Los Angeles, Calif.) Los Angeles Evening Herald Express photographs Herald-Examiner Collection photographs
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