the Positive Iohs emitted by Hot Platinum. 359* 



The data for the curves shown in fig. 1 were obtained from 

 this table. The agreement with equation (2) is at least as 

 good as the expected error warrants. The curve showing- 

 Fig-. 1. 



V, r , , 1 1 , 1 5 



Potential— volts. 



the relation between the logarithm of the current and the 

 potential is almost a perfect straight line, and the experi- 

 mental value of the gas constant comes to be 

 R=3-5xl0 3 , 

 A summary of the results of these three series of observa- 

 tions may be seen in Table III. 



Tabli: III. 



Series. 

 1 



Pressure, 



luilliin. 



Absolute 

 Temperature. 



Largest 

 current. 



2 x 10 

 17 X 10" 1 - 

 5xl0 -ia 



Mean 



E. 



280 nos 



40 x10 s 



3-5x10' 

 3-5 xlO 1 



o 



150 



1067 



_ 



0009 



1293 





3-6X10 3 



