﻿from the Cathode in Helium and Argon. 487 



used; hence it also warrants the conclusion, derived from 

 earlier experiments, that the anode absorbs hydrogen and 



nitrogen, when these are used as gas-filling, at a rate deter- 

 mined by Faraday's law. 



The Brace Laboratory of Physics, 

 University of Nebraska. 



Table I. 

 Aluminium Cathodes. Current, I/O milliampere. 



Duration 

 of current 

 (minutes). 



Sample Xo. 1 in 

 Helium. 



Sample No. 2 in 

 Argon . 



Gas pres- Pressure 

 sure (mm.), increment. 



±•01. ±-oi. 



Calculated 



increment 



in pressure. 



Gas pres- 

 sure (mm.). 

 ±•02. 



Pressure 



increment. 



±•02. 







3-76 



3-79 

 3-81 

 3-83 



3-86 

 3-87 

 388 

 3-90 

 3-92 







03 

 •05 

 ■07 

 •10 

 •11 

 •12 



14 

 •16 



221 

 223 -02 

 226 -05 

 229 -08 

 2-31 -10 

 233 -12 

 2345 -135 

 2-365 -155 

 2-385 -175 







•013 

 •04 

 •06 

 •09 

 •11 

 •14 

 •16 

 •19 



1 



3 



5 





9 



11 



13 



15 





Table II. 

 Aluminium Cathodes. Current, 2'0 milliamperes. 



Duration 

 of current 

 (minutes). 



Sample 2so. 3 in 

 Helium. 



i Gas pres- , Pressure 

 I sure (mm.), increment. 

 + •02. 4--02. 





 1 



3 

 5 



(i 

 7 

 9 

 11 

 12 

 13 

 15 



399 

 4-05 

 410 

 414 



4-17 



4-20 

 4-22 



426 

 4-29 







•06 

 •11 

 •15 



•*1S 

 •21 

 23 



: 27 



•SO 



Sample ISTo. 4 in 

 Argon. 



Gas pres- Pressure 



sure (mm.).! increment. 



+ •01. +-01. 



2-24 

 227 

 2 33 



2 : 41 



2-46 



2 : 50 

 2-56 







•03 



•09 



17 



•22 

 : 2G 

 : 32 



Calculated 



increment 



in pressure. 





 •025 

 •075 

 •13 

 •15 

 •18 

 •23 

 ■25 

 •30 

 •33 

 •38 



