Power with the Velocity of Cathode Rays. G5< 



200 



150 



; ICO 



<c 



50 





Of JO c 



' y / 



ey /o 

 / /o 



, 



///// 



/ / / t 





i ! i * * , ' 

 i i ! i ' / 



/////// 



1 :,',' '/ / 



/ / 



/ 





in///* 







•50 



r-o 



f-5 



I//ILUES Of N 



The numbers in column TI. give the velocity of the rays 



in cm. -r 10° per sec. ; those in column IV. give the absolute 



N 

 values of a corresponding to the values of ^ — 777-7: in 

 1 n r x 900 



column III. The method of calculating these columns is 



given later. 



In fig. 4, curve I., the figures in column IV. have been 

 plotted against those in column II. This curve represents 

 therefore tbe variation of specific ionization with the velocity 

 of the rays. 



In the same figure have been plotted the curves which 

 would have been obtained if the ionization had been inversely 

 proportional to the first and second powers of the velocity. 

 These are shown in curves II. and III. respectively. 



It seems in this region the rate of variation is intermediate 



