-28-
constant at llil:l.
6.
The ratio of Co57/zn®5 at Bikini and Eniwetok Atolls was
0.06:1.0.
Similar ratios occurred 200 miles south and west
of Eniwetok Atoll.
north.
Slightly higher ratios occurred to the
The center of high Co57/zn©5 ratio (5.5:1.0)
was
found approximately 480 miles west and slightly north of
Eniwetok Atoll and did not coincide with the center of high
total radioactivity in plankton, which was located 110 miles
north of Eniwetok Atoll.
7.
The changes in ratio of Co°//Pe55 with change in geo-
graphical location were similar to those of Co57/zn®5,
2