224 Mr. E. Jacot on a Relation between Ionization by 



In fig. 3 the values of -!j- have been plotted against 



the velocities of the rays. The curve shown is the curve 



obtained on the hypothesis that -^ varies inversely as the 



second power o£ the velocity o£ the rays. The points plotted 

 are the experimental points. 



Fiff. 3. 



& 









LA 



f 









L 





r 



\ 











2-72. 



5 

 3 40, 



6 

 4-08 



-J OsynfiS. 



476 on* p&r sec. x/o" 



We may take it, then, that the variation of (/> specifically 

 with the velocity o£ the cathode rays is given by an inverse 

 square law. 



Its variation with 6p and hence with np has been shown 



to be linear. <f> then, is proportional to -~ ; and hence the 

 total mass of nitrogen which enters into combination with 

 the phosphorus is proportional to -—-• 



Part II. 



The ionization in the chamber V 2 immediately before the 

 gas is admitted to the phosphorus in P, is the equilibrium 

 ionization due to cathode rays when a steady state has been 

 attained. 



In the general case, this steady state is reached when the 

 gain in the ions made per second by the rays is exactly 

 balanced by the loss through recombination and diffusion. 



Consider the ionization by a cathode ray per c.c. of gas. 



