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® PLATE
5953
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15306
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@ © pLATE 5520
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Fig. 4.
l
100
200
300
DAYS
AFTER
L
400
MAY
14,
500
1954
l
600
1
700
Decay of beta-activity in three Coenobita carapace samples, each compared with the
theoretical decay curve ( solid lines ) for 5r89 + Sr9° from Figures 2 and 3.
-2T-
10