[clinkJ radiation .AT THE SURFACE OF THE EARTH 



TABLE XV— Continued. 



139 



Time 



April 4th 



and 5th 



1909 



Ions per 

 c.c. 



Barometer 



Time 



Ions per 

 cc. 



Barometer 



7.35 p m. 



7.55 " 



8.13 " 



8.35 " 



8.55 " 



9.15 « 



9.35 " 



9.55 " 



10.15 " 



10.35 " 



11.00 " 



9. S 

 10.5 



9.9 



9.6 

 10.4 

 10.3 

 10.45 



9.6 

 10.35 

 10.3 

 11.4 



29 



29 



29 



29 



inches 



243 



245 



257 



255 



8.50 p.m. 



9.05 « 



9.20 " 



9.40 " 



9.55 " 



10.15 « 



10.30 " 



10.50 « 



11.05 " 



11.20 " 



11.9 

 10.8 

 11.1 

 10.5 

 10.1 

 10.5 

 9.9 

 9.9 

 10.1 

 10.1 



29.276 inches 



29 



29 



273 " 



266 " 



TABLE XVI 



