Nolan and Harris — lonisatdon in Moist and Dry Air, 



33 



been corrected to correspond with normal atmospheric pressure. The general 

 effect of the correction is to improve the agreement. 



Vu=2S 



4 



Fig. 1. 



lonisation curves in saturated air, air-current method, showing ions, positive and negative, of 



mobilities 12'2, 6-62, 4'23, and 3-00, and negative ions of mobility 24. 



Table of moke Mobile Ions. 

 (Mobilities in cm./seo. per volt/cm.) 



Negative. 



Positive. 



24 



12'2 



6-58 



4-24 



3-03 



1 — 

 12-5 



6-61 



4-14 



2-92 



24 



12-2 



6-57 



4-21 





12-3 



6-60 



4-21 



2-95 





12-3 



6-66 



4-26 





12-3 



6-65 



4-24 



3-11 





12-0 



6-70 



4-28 





I2'25 



6'83 



4-36 







12-0 





4-30 

 4-26 













A weighted mean (making no distinction between positive and negative) gives the 

 12-2, 6'62, 423, and 3 00. 



values : 

 [8*] 



Q 



