GROSS ACTIVITY Graph 3 . J C/KG WET 10,000 160 ~ Oo. b= 1,000 a 10 ISLAND SOIL — 100 1 — & \ _— \ ae COCONUT MILK ALGAE ~~! \ HE oO 6 — 10 0.1 BEACH ‘ -— SAND \S \ f 1 \ x ~ 0.01 — — L 10 \ 25 | 135 1 280 | 600 0.1 0.001 10 Jj Jt 25 135 330 DAYS AFTER MARCH 1, 1954 RATE OF DECLINE OF RADIOACTIVITY IN ALGAE AND SOILS AND COCONUT MEAT AND MILK AT RONGELAP ATOLL FROM MARCH 26, 1954 TO OCTOBER 23, 1955. 427792—57———38 | 600