34 Table 1. Radioactivity of Plankton, FilterPaper with Residue from Water and Filtered Water (lesa Kk) Plankton in d/m/z wet Filter Paper with Residue in d/m/liter of water Water in d/m/liter Flankton Filter Paper Sur- Sta- tion face 25m. Water 50m. 75m. 100m. 7200 0 380 O 130 $3100 12 0 180 62 £42100 © 0 0 Sur- face 25m, 50m. 75m. 240 3200 100 14000 320 6.000 280 0 400 1500 Oo 0 0 0 0 1100 0 0 0 0 | 100m. 1A B C D E 130 2300 2300 9600 30000 23 0 120. O 490 0 670 180 1100 130 2A B C D E =1600 5400 7900 21000 3700 110—Sso L440 560 650 2300 © 8&9 63 «92 500 180 180 4L0 180 530 89 62 0 0 110 0 510 390 370 300 1800 850—s 1300 O 4h0 0 4k 1700 1500 2400 0 0 0 220 3A B C D E 5200 4100 20000 36000 84500 40 190 63 2700 2200 0 4h0 130 180 «46 180 190 180 180 180 Q Q 92 Oo 180 180 250 180 180 100 460 620 1400 2200 0 1700 1500 2200 1800 0 ~ 1800 440 1500 0 0 0 660 1500 KA B C D 2900 2900 15000 57000 250 6100 3400 1900 0 63 340 0 360 0 290 0 180 O 250 0 250 130 0 4,8 380 2800 2200 580 0 0 4200 440 1100 0 0 4000 QO 0 0 2600 1300 0 600 2900 5A 17000 8000 Oo 63 190 62 4300 2100 1500 1200 1200 E B C D &—& 12000 16000 8300 §2000 11000 1100 = 230 1600 210 1500 120 5100 1100 93 1600 O 2 62 400 0 O 84 12 17700 62 46 81, 160 62 0 440 2000 2200 2800 890 1600 1200 gg00 17000 10000 740 740 520 - 660 1600 1800 30000 440 - - 0 0 0 0 0 0 0 0 0 0 0 0 - 880 0 59 3800 590