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dowevec, to check the theory carefui.y, it is necessavy to
chiooce foveicn coil sampies whicn are wiiely celected ovex the
world and which are carefuily avialyzed by the HCl extraction
technique which vemoves all of the contained stcontium-9).
The
only complete series of data availabie iz for samples collected
in the year 1955.
They are presented in Fi,ure 15 toyethe-
with the theoreticait prelicted curve for that same period.
The
total observed fallout wa. oO me,jatons of fission and the iJ year
vecidence time theory would peedict somewhat less thai. that,
peshapc the average of 5.3 and o.1 me,atons, these vein; the
figuces for the two dates, January 1, 1955 and January i, 195/.
The foreicn coil vampies were collected througnout 1955 ara
veprecent vometihiin, iLike an averaze for cnat period of cime.
Coxresponding fi,ure. for the
shorter ectratospheric reciderice
cime of 5 years ave 8.Jc and 12.44.
It wouid seem from these
numbers that a recidetce time in the stratospnere of betweer
5S and 1J years is indicated.
ile ciiart see tater that thic
agrees with other .nformatici ac weil.
¢
veries of soil samples
taken in the cpring of 1955 and tne .955 samples divided into
two parts For tne spring of 1955 and the rest of the yeac,
toz,etnhes with Lome camplLes takei. in the .pring of 1956, for
waich preliminary analyles ase available are presentea in Tabie IV.
Focusing on the :atitude. in the Joutherr Hemisphere so that
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