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degrees: ofinteraction. of thesevariables: upon thedecline of .
Wioactivity with increasing.time after contamination ara not.
known, rigid. interpretationsof the shapes of the curves should
“not be attempted. However, the curves are useful in eatimating
the levels of activity in the different organs on given dates
‘following the contamination of the atoll.
wit’. Deeay curves were made fort a limited number of samples, . of
these, onlythat of the thyroid evidenced a preponderance of a ~~
“‘pingleisotope,- zis} which accounted for 99.9percent or more
| ‘Kidney. there was evidence: of mixtures of isotopes. Slopes of
pew (7825 pop ‘liver, 1 e085. for bone, and acurve for kidney,
"whieh is rot:a: straightline ‘either logarithmically or semiloga‘pithaf{eally;: ‘Indicate. that these organado not contain similiar
patios of: radloactive Isotopes,‘ The decay curve slope for ‘tern
“Liver! 1s similar‘to.thatof Rongelapsoll... 9 5.
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‘of: the. total- activity, Indecay curves for bone, liver, and
Alily Ghemieal- separation for strontium wag done on two bird
samplescollected Mareli 26,°1954,at Kabelle., Skingfrom two
different terns contained2.9 percent and 3.5 percent: of the |
total activity. as radionetive strontiua. In samples of total. .-
musele plus ‘total bone from the sane birds, sr5972° comprised
3.9 percent and 11,3 pardent. of thetotal activity. (fable VII).
cu. theonly collections at Rongelap © Atoll containingbirds
‘frow doth thernorthern: ainnd: Botithern- islands were wadeJanuary
26%30,°1955 6.InViewoPthe fact.that thegeneral levels of.
‘qontamination:werehigher’ of. the:riorthern islands, it: was expected.that: the northern: birdswould ‘contain more: radloactivity
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