Electricity of Drops. 



347 



The hydriodic acid thus diminishes the water effect : the 

 stronger solutions are nearly neutral. 



Oxalic Acid. 



The standard solution contained 1 centigramme of acid in 

 100 cubic centhn. of water. 



Strength of 

 Solution. 



Deflexion. 



255 + 



280+ 



Water 



•2 c. c. of standard solu- 

 tion in 100 c. c. of water 

 3-2 „ „ „ „ ' 190+ 

 6-4 „ „ „ „ 110+ 

 25-0 „ „ „ „ 60+ 

 50-0 „ „ „ „ 40+ 



Strength of 

 Solution. 



•01 grm. of acid in 

 100 c. c. of water 

 "02 „ „ ,, , 

 •04 



•"■^ >) >) >> 1 



1-25 grms. „ „ 

 O'U ,, ., ,, , 



Deflexion. 



20+ 



10+ 

 

 

 

 



Tartaric and formic acid gave very similar results. 



Zinc Chloride. 



Strength of Solution. Deflexion. 



Water 170+ 



0017 gramme of ZnCl 2 in 100 c. c. of H 2 150+ 



60+ 



•0136 



•085 



•17 



1*36 grammes 

 10-8 

 85-0 



15+ 

 5+ 

 

 

 



Thus zinc chloride behaves in the same way as hydrochloric 

 and the other acids. 



Chromium Trioxide. 



Strength of 

 Solution. 



Deflexion. 



Water 30+ 



•00016 gramme of salt l r , 



inlOOc.c j 10 + 



■00064 „ „ „ 15- 

 •00128 „ „ „ 50- 

 •00256 „ „ „ 85- 

 •005 „ ., „ 110- 



Strength of 

 Solution. 



Deflexion. 



*01 gramme of saltl ,^_ 



in 100 c. c j 



•04 „ „ „ 210- 



•16 „ „ „ 225- 



1-25 grms. „ „ 270- 



2-5 „ „ „ 240- 



50 „ „ „ 190- 



Thus chromium trioxide reverses the electrification on the 

 drop, producing a very large negative electrification on the 

 drops. 



Effects similar to those produced by chromium trioxide 

 are also produced by hydrogen peroxide. 



