Samples of rainwater were taken at the following times: Erom To Increase in Background 2100 - 4/24/51 0300 - 4/25/51 0 2400 - 4/27/51 0500 - 4/28/51 0 0300 ~ 4/30/51 1030 ~ 5/1/51 0 2200 = 5/2/51 1000 - 5/3/51 0 No significant increase in background was detected in any of the rain samples. Data was taken from April 14, 1951 through June 15, 1951. pO’ ARCHIVES