Levels of beta radioactivity of plankton collected from Rongelap lagoon in 1958. . Locality Collection date Collection No. First count Plate Month No.1958 and day uc/kg series 1958 ash Rongelap I. March 1 Tow rt " Kabelle I. " RongelapI. " " ray ih tt 1 " " March9 " Aug. " " it tt " 16 " " i ! tf 2 1 9001 " 3 5003 " Tow " " 2 Il 2 3 5005 5023 5022 5021 Tow ‘t " 1 5002 5004 9-16 "w " 9-16 " 10-22 " " Second count Month and day uc/kg 1958 ash .24 11-20 295 .32 11-21 .33 .O77 6.8 3.5 4.6 11-18 11-19 11-19 " . 103 4.5 3.5 2.9 . 37 33 W it 3. 0 VW 5 4. 2 " 3. 2 '" 2.7 2.7 11-21 1.3 .62 02 14 11-19 11-20 11-19 . " Kabelle I, " " " Aug. " " " 21 " " " Tow " " " 9-16 11-18 " 1.6 i.1 43 .66 " 11-18 " 11-21 1 u §-7 5024 8 1 l 2 5025 5006 5028 5029 3 5030 "WW tt #t Ww tf iy 4 5031 " t ! " ve 5 5032 tl it " iB) 6 5033 1 5017 3 5015 Enigan Pass Pigen Pass South Pass Aug. 15 Sta. "uN " mou 3.8 3. 4 3.3 3.7 iA 11-19 " " " " i 10-22 " tt " mn tt Tow 1 $5026 Tows 2-5 5020 wt i 5027 18 " " alcohol . 34 5019 Aug. " tt Preservation of plankton 4 EniaetokI. " tt Third count Month and day yuc/kg 1958 ash 2 =6§014 2. 6 l. 3 tt " " 2. 7 I . 25 tr 1.0 .og " dried " " st fresh " " 't l al a] W . 63 ial it " . 88 tr rt 10-22 " " 1. tr 2.7 ~OZ- Table 4. 5.7 .021 .034 11-20 " 11-21 4.0 .021 .019 alcohol " "