Nolan — Ionic Mobilities in Air and Hydrogen. 



n 



Some of the results obtained with this apparatus are given in fig. 2. 

 The lower curve is the result of taking some widely scattered observations 

 over the whole range. It shows some irregularities, but nothing definite 

 except a rise towards the end. Anyone who is inclined to regard the first 

 part of the curve as being due to some fortuitous irregularities, will draw a 

 line as has been shown, and will conclude that the curve indicates the 

 presence of ions of mobility 



(i'^/.eOO = 1-54, 



and of nothing more. When it is worked over carefully in detail, however, 

 distinct evidences of a definite structure in the earlier part of the curve are 



Time In Seconds 



Fig. 2. 



found. Some of these are given iu fig. 2 ; the scale of time is the same as 

 for the lower curve, but the scale of current has been magnified, the ratio 

 being, in some cases, 3 and in others 5. The current values are plotted 

 to various arbitrary zeros for convenience. There can hardly be any doubt 

 as to the significance of these curves. They show sharp increases of current 



