-5intervals starting on May 22,
1955.
1954 and continuing to March
The locations of these plants on the island, which
was divided arbitrarily into areas A, B, C and D, are shown
in Figure 2.
At each collection period at Belle Island,
samples of
the
top two
Scaevola plant No. 1319
inches of soil near
six sub-
the base of
were combined and an
aliquot of
the combined sample was taken for the measurement of gross
beta radioactivity.
Gamma survey-meter readings also were
taken to determine the gamma dose to which the plants were
subjected.
After the plant samples were collected they were put
on ice
and
Laboratory
taken to
where they
the
Eniwetok
were
Marine
dissected,
Biological
weighed,
dried,
and packaged and later sent to the Laboratory of Radiation
Biology in Seattle, Washington,
outlined in uwer-33 ‘4? ,
muffle
furnace at
for geometry,
and
decay.
The samples
540°C and
flow counting chamber.
for further
were
processing as
dry-ashed ina
counted in an internal gas-
Corrections were made in the counts
backscatter,
coincidence,
All counts for the 1954-1955
self-absorption
and April 1956
samples were corrected to the date of collection,
the decay
factors being based on a soil sample collected May 15,
at Belle Island.
1954
For the early collections decay factors as