984 MESSRS. A. WALLER AND A. DE WATTEYILLE ON THE INFLUENCE 
Aftereffects tested by the Induction Current. 
1. F + after G-f is less than before. 
2. F— after G— is less „ 
3. F+ after G— is greater „ 
4. F — after G+ is greater ,, 
That is to say : Jcathodic excitation of a given region produces less effect after than 
before kathodic polarisation, greater effect after than before anodic polarisation. 
5. The diminution of 
F — after G 
6. The increase of 
F— after G+ 
*°n °^j is greater than 
is greater than 
the diminution of 
F+ after G+ 
the increase of 
F-f- after G— 
That is to say : the after-kathodic diminution and the after-anodic increase are more 
marked in the polar than in the peripolar region. 
These statements are illustrated in Tracings 15-20. They refer to the immediate 
after-effects, i.e., those manifest within the first few seconds after polarisation has 
ceased, and we must add the statement that the after-anodic increase is of long 
duration , the after-kathodic diminution soon gives way to an increase of long duration 
(Tracing 34). 
After-effects tested by the Galvanic Current. 
Immediately. 
less* 
Subsequently, 
greater* 
1. K.C.C. after K.D. is 
2. K.O.C. „ K.D. „ 
3. A.C.C. „ A.D. „ 
4. A.O.C. „ A.D. „ 
5. K.C.C. „ A.D. „ 
6. K.O.C. „ A.D. „ 
7. A.C.C. „ K.D. „ 
8. A.O.C. „ K.D. „ 
greater 
% 
less* 
greater' 
greater* 
less* 
greater 
greater 
less 
2 
greater 
greater 
less 
less 
than before polarisation, 
U 
n yy 
yy 
yy yy 
yy yy 
yy yy 
yy yy 
That is to say : kathodic excitation produces less effect after than before kathodic 
polarisation , greater effect after than before anodic polarisation. 
