bij Matter of the /3 Particles emitted hi/ Radium, 

 Table L 



| I 



Number of t3 particles 

 I Thickness of glass, per second 



in millimetres. from radium C 



in one gram of radium. 



179 



First Series of 



Experiments. 



•120 





3-27 X 10 10 



•376 





1-51 „ 



•695 





•722 



•045 





-533 ,, 



1-205 





•342 „ 



Second Serie 



s 



: Experiments. 



•078 





3-68 x 10i° 



•078 





3-41 „ 



; 409 





1-19 ., 



•667 





'79 „ 



1-199 





•311 „ 



1-299 





•297 . 



1-329 





•158 ., 



1-76 





•0394 ., 



1-936 





•0834 „ 



Fist. 3. 



OS. 



I 



T 



•8 1-Z 1-6 



MillimtUrs 



20 



N2 



