-32- Stems Q————_———_o 10° 2 Theoretical decay of mixed Fr products (15) fission 10 u \ uc/kg \ of wet tissue 1, --- Pre-Nectar i. stems 1 10 Days after May 14, Figure 11. Toy000" 1954 Decline of radioactivity of whole stems of Scaevola sp. at Belle Island, 1954-1955, compared with the theoretical decay of mixed fission products (15),