Passage  of  Electricity  through  Liquids. 
375 
ber  of  the  corresponding  chlorine-molecules  before  the  electrical 
current  is  set  up.  After  this  has  passed  through  the  liquid  for 
a  second,  F0  G0  has  come  into  the  position  F  G,  P0  Qo  mto  the 
position  P  Q.  The  middle  dotted  line  at  right  angles  to  the  x 
axis  denotes  any  section,  supposed  to  be  fixed,  towards  which  the 
displacement  is  observed.  The  distance  of  the  points  P0P  or 
F0  F  measured  upon  the  x  axis  represents  the  whole  equivalent  - 
number  of  partial  molecules  moved  through  the  fixed  section ;  the 
distance  of  the  points  P  F  or  G  Q  the  number  of  the  equivalents 
separated  at  the  anode  or  cathode;  the  distance  of  the  points 
F0  F  and  Qq  Q  the  number  of  equivalents  of  salt  by  which  the 
concentration  at  the  electrodes  has  increased  or  decreased. 
~ 
B 
G    ' 
1 
m 
The  three  figures  refer  to  : — 
I.     M>0     M'>0, 
II.     M>0     M'<0, 
III.     M<0     M'<0. 
[To  be  continued.] 
