64 



EXPEIOMENTS WITH IONIZED AIR. 



Ill the chart, figure 3, 1 have constructed .r = 60 i/EO\n 10, which in view of 

 the nearly constant initial potential ilifferences ^, varies as the cun-ent i, in its 

 (lei.endence on V. The linear character is apparent. The colors ( Y, yellow, B +, 

 dark bliit-, ^ -, light l>lue, (y, green, 0, opacpie) are inserted. 



4. Effect of presence or absence of electric JieU. — The effect of the presence or 

 absence of this electrical current on the color tube is quite inappreciable, no change 

 of tint or suggestion of change occurring on charging the condenser. I gave the 

 ' Initial field yellowish. ' Initial field bluish. Less steam taken. 



