306 



Prof. J. J. Thomson on Cathode Rays. 



obtained in this tube are given in the Table under the heading 

 Tube 3. 



The results of a series of measurements with these tubes 

 are given in the following Table : — 



Gas. 



Value of 



W/Q. 



I. 



m/e. 



v. 



Tube 1. 





4-6 Xl0 n 

 1-8 XlO 12 

 61 XlO U 

 2-5 XlO 12 

 5-5 XlO 11 

 1 X 10 12 

 1 XlO 12 

 6 X 10 12 

 21 XlO 12 

 8-4 XlO 11 

 1-47 XlO 12 

 3 XlO 12 



230 



350 

 230 

 400 

 230 

 285 

 285 

 205 

 460 

 260 

 340 

 480 



•57x10-7 

 •34 X 10~ 7 

 •43 XlO -7 

 •32 XlO -7 

 •48xlO~ 7 

 •4 XlO -7 

 •4 XlO -7 

 35 XlO -7 

 •5 XlO -7 

 •4 XlO -7 

 •4 Xl0~ 7 

 •39 xlO~ 7 



4 XlO 9 

 1 XlO 10 

 5-4 XlO 9 

 1-2X10 10 

 48 XlO 9 

 7 XlO 9 

 7 XlO 9 

 6 XlO 9 

 9 2X10 9 

 7-5 XlO 9 

 8-5 XlO 9 

 1-3 XlO 10 







Air 



Air 



Air 



Air 



Hydrogen 













Tube 2. 



Air 



28 XlO 11 

 44 XlO 11 

 35 XlO 11 

 2-8 XlO 11 

 25 XlO 11 

 2 XlO 11 

 18 XlO 11 

 2-8 xlO U 

 4-4 XlO 11 

 2-5 XlO 11 

 4-2 XlO 11 



175 

 195 

 181 

 175 

 160 

 148 

 151 

 175 

 201 

 176 

 200 



•53 XlO -7 

 •47x10-7 



•47x10-7 

 •53x10-7 

 •51 XlO -7 

 •54x10-7 

 •63xlO~ 7 

 •53x10-7 

 •46x10-7 

 •61 XlO -7 

 ■48 XlO -7 



33 XlO 9 

 41 XlO 9 

 3-8 XlO 9 

 33 XlO 9 

 31 XlO 9 

 2-5 XlO 9 

 23 XlO 9 

 3-3 XlO 9 

 4 4 X 10 9 

 2-8 XlO 9 

 41 XlO 9 



Air 







Air 











Air 





Tube 3. 



Air 



2-5 XlO 11 

 3-5 XlO 11 

 3 XlO 11 



220 

 225 

 250 



•9 XlO" 7 



•7x10-7 



1-0x10-7 



2 4X10 9 

 3-2 XlO 9 

 25 X 10 9 



Air 



Hydrogen 





