Phil. Mag. Ser. 6, Vol. 25, PL V. 



ip. 



H 2 = Secondary Spectrum of Hydrogen. 

 O a = Series Spectrum of Oxygen. 

 E =Elementary line of Oxygen. 

 Li = Spectrum of Lithium. 



scharge. 



(M 



-># 



Ca 

 1 



o E 



0«| 



Oe^Oe 



| Li JL 



OS 



Li 



1 



Li Li 





u 



a 



m 

 O . 



Wo 



«« 9 

 °S 



.§* 

 —\ 



80~ 

 80 

 80 



Current through 

 Brush in 

 amperes. 



00 



P.fl 

 "3 * 



TO O 



'•3 a 

 a g 



|«2 

 P-i 



No. of Discharges 

 per h Alternation 

 of Current. 



b 



•014 



650 



20 



c 



•029 



550 



7 or 8 



d 



•064 



610 



2 or 3 



e 



40 



•084 



410 



1 



a 



60 

 60 

 60 

 15 



•053 



500 





b 



•057 



520 



20 



c 



•084 



565 



4 



d 



•17 



425 



2 



a 



42 

 60 



•043 



3600 





b 



•0"4 950 





c 



b0 



•027 | 9o0 





Fig. 2. 



Lithium Carbonate 

 •01 per cent. 



Point ='5 mm. diam. 



Fig . 4. 



Lithium Sulphate 

 *1 per cent. 



Point =-5 mm. diam. 



Fig. 6. 

 Distilled Water. 



Point— "5 mm. diam. 



scharge. 



ary. 



round 

 trode. 



le. 





9 

 a 



m 

 O • 



m a 



°a 



a. a 



EH 



a . 



■H uj 



d '- 



«.a 



■-3 « 



•J3 a 

 a £ 



■§•8 

 Ph 



^_ a 



oa 

 •** .. 



5 '|« 



a 



h 

 c 



d 



e 

 f 



60 



•045 



785 



•05 + 



60 

 60 



•032 



725 



51 



•029 



840 



» 



60 



021 



880 



» 



60 



•013 



760 



»» 



60 



•009 



760 



„ 



Fig. 8. 



Dilute Sulphuric 



Acid 



•1 per cent. 



J 



