RATE OF DECAY OF THE EXCITED RADIOACTIVITY. 159 
Be ay Ae 
ie A ae 
ee ey ae 
SaaS Ree 
eine RP Bee 
SSSA eae 
SHA 
ae ae eae. 
Po ee 
ee He ie Be 
ee et eh ee 
ae are ae ee 
3 
Fig. L—RATE OF DECAY OF THE RADIO-ACTIVITY FROM THE ATMOSPHERE IN SYDNEY. 
10 
“Kpanoy Sen he 
