-51Lagoon currents are considered to be responsible for
the teadency of marine, shallow vater orgerieme to contain
shoeter-lived redtofsctopes in the vicinity of the southern
islands, and especially at Leroy, than at the northern
islands where longer-lived products predominated. Sot] from
Leroy Island proper, which could not be affected by currents,
on the other hend, exhibited eas long se radiocactive life as
that from the northern islands.
Radiochemical analyses made in Pebruary 1256 by Miss
South, in which methods designed for the detection of fission
products were used, shoved that 52-618 of the radioactivity
in samples of spider snail muscle and asantile and ip aea gu-
cumber gut, and 10% tn clam kidney was due to Cel54-prl44.
About 50% of the activity in carapace and 5% in muscle of the
lend hermit cred vas due to Sr90.
Gamma spectrometric analyses made tn December 1956-May
1957 by Lowman, et al. of kidney and snail liver collected in
1993-52 at Belle
demonstrated the presence of Rvl06-pnl%,
Mn>4, Co57 and Co°9. Resin column analyses, by the same
authors, in December 1956 of * September 13956 sample of Belle
Clam kidney showed Fe55 to account for 74% of the activity,
co5?--9. €, C058--39.2%,
C060--1.88,
y91--2.64, mn54--2.2¢,
and Rul06-Rnl06, 7r95-NbI5, and Pe59, together, --1%.