- 35 in the following table. Log-log Slopes of Coconut Meat and Milk Taken from Rongelap and Kabelle Islands in 1954. Kabelle 3/26/54 Meat Milk 1.0 0. 0.8 0.8 0.7 Kabelle 7/16/54 Meat Milk 0.5 0.8 1,0 0.1 0.15 Kabelle 12/8/54 Meat Milk 0.7 0.8 0.8 0.19 0.3 0.2 Rongelap 12/18/54 Meat Milk. 1.1 1.4 60.2 0.1 These slopes indicate that coconut meat and milk select different radioactive isotopes during their metabolic activities and that the milk is definitely absorbing an isotope mixture containing, for the most part, long-lived isotopes. From the chemical data, fission products yield and decay analy- ses, it is believed that ce3 7 is the major contributor. It has been shownthat the level of radioactivity in the plants at the northern islands of Rongelap Atoll is higher than that at the southern islands, that this activity is declining at the present time at a slow rate (Fig. 12), and that there is a selective uptake of certain isotopes among which cs 137 ce!44 0 Ru! 6 zr’, and sr? 0 are the most important. Algae In the October 1955 survey, samples of marine algae were taken from the shallow water of the lagoon near shore and by diving to the bottom in