ay other left closed. A run of equal time was then made 10,000 feet above the cloud with the second sampler open and the first closed, NUMBER RATIOS The number of fissions measured in the samples by radio~chemistry at Los Alamos averaged 77% of the number predicted at PPG from observation of radiation levels of the sample papers through the shipping pigs after removal from the aircraft, This drop was compensated by increases in pilot dosage based on experience with the previous REDWING shots, ' COPIED/DOE , LANL RC (