Flames  containing  Salt  Vapours  for  Alternating  Currents.    493 
In  fig.  4  the  above  values  o£  -7 —  y,  and  the  corresponding 
strengths  of  the  solutions,  are  shown  graphically*  for  each 
salt.  Fig.  5  shows  the  steady  currents  due  to  an  E.M.F.  of 
0'227  volt,  taken  from  the  papers  referred  to  above. 
Fio-.  ,5. 
0  10  20     G/f/IMS  PErtl/T*E 
The   amount  of  salt    entering   the    flame  in  the  present 
experiments  was  nearly  the  same  as  in  the  older  experiments. 
The  following  table  gives  the  values  of   = — T  for  deci- 
u>2     a  i 
normal  solutions  obtained  from  the  curves  in  fig.  4,  and  also 
the  steady  currents  due  to  0*227  volt. 
Salt. 
CsCL... 
|O2C03 
£Rb2C03 
RbCl  . 
£K.2C03. 
KOI  .... 
_1__1 
(*) 
67 
5-9 
37 
3-2 
2-9 
2-0 
Salt, 
CsCL... 
CsN03. 
RbNCX. 
EbCl  . 
^K2C03 . 
KC1.... 
Steady  Current 
(1  =  1CT7  ampere). 
Katios. 
k   ' 
222 
33 
0-70 
366 
62 
1-03 
259 
7 
1-37 
11-3 
3-5 
105 
11-2 
3-9 
115 
575 
22 
0-92 
The    fifth    column    contains    the    ratios    of    the    numbers 
expressing   the    conductivities    for    steady   currents   to   the 
values  of  -, .     In  the  previous  work  the  conductivities  of 
caesium  and  rubidium  carbonates  were  not  measured  ;  so  the 
values  for  nitrates  are  given,  since  the  conductivities  of  all 
oxysalts  of  the  same  metal  were  found  to  be  nearly  equal  for 
