230 Mr. E. Jacot on a Relation between Ionization hy 



In fig. 5 the values of a have been plotted against the 

 velocities of the rays. The curve drawn is the curve obtained 

 on the hypothesis that a varies inversely as the second power 

 of the ray velocity. The points plotted are the experimental 

 points. 



Fig. 5. 



<x 



2/8 



its 



hSk 



Q 















\! 















\ 

















• 











v ! 































\ < 

















N. c 





4 



2-72 



5" 

 3 1,0 



6 



-, 08 



7 cumfis . 

 kj(> G-m6 hdSSec. \IO~ 



We may take it, then, that the variation of the specific 

 ionization in nitrogen by cathode rays with the velocity of 

 the rays is given by an inverse square law. 



From the results of the work described in Part I., con- 

 sidered in the light of this conclusion, it becomes established 

 that the total mass of nitrogen which enters into combination 

 with phosphorus under the conditions treated of is directly 

 proportional to the equilibrium ionization of the nitrogen. 



Discussion. 



(1) Calculation of the specific ionization in nitrogen by 

 a cathode-ray corpuscle of known velocity. 



We proceed to a numerical estimate of the specific ioni- 

 zation in nitrogen by a cathode-ray corpuscle of known 

 velocity. This is given by the value of «. 



From columns 3 and 1 of Table IV. we have as follows : — 



For a current of 5*5 amps, through the solenoid, i. e. a ray 

 velocity of 3*7 x 10° cm. per sec. 



5=13-6. 

 V 



