4 Messrs Carse and Laby, A relation between the velocity 
Ion 
Ionic formula 
Organic onnmonium cations : 
Ethyl ammonium 
c 2 h 5 h 3 n- 
Propyl „ 
c 3 h 7 h 3 n- 
Ally! „ 
c 3 h 5 h 3 n- 
Tertiary butyl ammonium 
(CH 3 ) 3 CH 3 N ' 
Tetramethyl ,, 
(CH 3 ) 4 N 
Methyl diethyl ,, 
CH 3 (C 2 H 5 ) 2 HN 
Trimethvlethyl „ 
(CH 3 ) 3 C 2 H 5 N* 
/3 Chlorethyltrimethyl ammonium 
CClHo . CH„ . (CH 3 ),N 
f3 Bromethyltrimethyl ,, 
CBrH, . CH.,(CH,)..N 
Trimethylallyl ammonium 
(CHj J C J H,N- 
Dimethyldiethyl ,, 
(CH 3 ) 2 (C 2 H 5 )„N* 
Trimethylpropyl „ 
(CH 3 ) 3 C 3 H 7 N- 
Triethyl ammonium 
(C a H 8 ),HN- 
Trimethylisobutyl ammonium . . . 
(CH 3 ) 3 C 4 H 9 N- 
Methyltriethyl ,, 
CH S (C.H,) S N- 
Iodomethyl triethyl ,, 
CH 2 I(CoH,) 3 N* 
Tetraethyl ammonium 
(C 2 H 5 ) 4 N- 
Triethylallyl „ . . 
(CoH 5 ) 3 C 3 H 3 N‘ 
