-~15- 
observed at station 42 approximately 480 miles west and 
slightly north of Eniwetok Atoll and did not coincide with 
the center of greatest total radioactivity which occurred 
approximately 110 miles due north of Eniwetok Atoll (21). 
The C057 /zn®©5 ratios decreased with increasing distance in 
all directions from station 42. 
The ratios of Co>!/fe55 for the five plankton samples 
are shown in Figure 4c. The ratios are similar to those of 
Co57/zn©5. The values are as follows: 
Cool Cool 
Station 7n©5 Fe5 
339 0.6 0.5 
3) eS O26 0.4 
43, 44,45,46 0.9 q-2 
SUR Sil 5255s OZ O12 
Bis 53559 Oo 0.1 
