_ie a he peer the external plant parts. ae 4 “t iS # a oe Levele of activity in successive collections through |and ineluding December 1954 drop in accordance with the expectation RES So OREAET SRERERaSE PEPER fermen This eould be due to a sampling error, but might also be a reflection of greater availability af the fission products to the plants assoclated whith more rainfall during late December to danuary. The values for arrowroot collectédon i Rongelap Téiana in Jamary 1955 fell within the range of values for arrowroot from the:‘hoptherns islands, The same is true’ of algse collected at - depths of 10 to 25 fathoms in the vicinity of Kabelle and Rongelap Islands, However, the maximum activity levels found in Halimede sp. and Caulerpa sp. from Rongelap arehigher bya faster of about two than the maximo Levels found, in the same species collected at Kebelle. It appears Likely then thet al- though maximum fallout occurred ab the north end of the atoll, the radioactive material is being redistributed, taroushout the atoll.at least in the deeper waters. 5 “ Decay rates of five individual samples of algae and land plants collected in duly and Deceuber 1954 indicate half lives ranging, from160 +alodaysduring“the|period frou ‘Detenber“1954 Nk ah stems to April 1955. Asample ofcogonutmilkgollested at Kabelle ~~ co island inDecember 95%» however, shows a half-life of epproxt« Syncs saneais of the decay auevee oF oe zg, matory. shrea.years,,“he slopes =GONFDENTIARS== do oe Ae eremTOEE, se mpm Yet ene nv renee ee . wee ahaaoe” Se Oe levels (Figure 9). 82 ee lections; however, show a trend toward increasing activity tT ax % 4 AOE Ee onpansy ' for mixed fission products, The January 1955 land plant eel~-