Table 1. Gamma dose rates three feet above ground in milliroentgens per hour at Belle Island, March 21, 1955 * Date Days after 5-14-54 Mr/hr Eniwetok Atoll, Date May 15, 1954 to Days after 5-14-54 Mr/hr 5-15-54 1.4 375 6-10 27 20 5-16 2.2 230 6-11 28 19 5-17 3 180 6-18 35 13 5-18 4 130 6-25 42 12 5-19 5 140 7-1 48 10 5-22 8 70 7-8 55 6.5 6-1 18 30 7-15 62 6 6-2 19 30 8-5 83 5 6-3 20 28 9-7 116 2 6-4 21 27 11-30 200 2 6 6-7 24 22 3-21-55 305 0.8 *Early readings taken with a PDR-39 ionization chamber survey meter and later readings with a Juno AEC Model 51C-17C survey meter.