1888-89.] Mr G. N. Stewart on Etectrotonic Variation. 239 
ls£ set. — Distances — mm.; b , 9 mm.; c, mm. ; d, 9 mm. 
Polarising Current. 
Stimulation 
Effect. 
5 D l 
+ 45 
Shunt 10. 
1 D l 
- 6 
5Dl 
+ 27 
Not compensated. 
5D1 
+ 129 
Compensated. No shunt. 
5 D f 
- 51 
99 99 
2 nd set. — Distance- 
— c, i\ mm. 
Other distances the same as before. 
Polarising Current. 
Stimulation 
Effect. 
5 D l 
-22 
Compensated. No shunt. 
5 D| 
-10 
)) 99 
Experiment 4. 
Distances — a , mm. ; b , 9 mm. ; c, 6| mm. ; d, 9 mm. 
Polarising Current. 
Stimulation 
Effect. 
Same nerve ; distance c made 3 J mm. 
lDl 
*/ -47 
\ -42 
Polarising Current. 
Stimulation 
Effect. 
2 D l 
-41 (?) 
7 D Jr 
-37 
3 D 4 
/ -68 
\ -69 
lDfr 
- 5 
2D| 
/ -65 
\ -82 
Same nerve ; distance c 
made 1 mm. 
1 D l 
/ -28 
t -32 
Polarising Current. 
Stimulation 
Effect. 
5 D 4, 
/ -45 
\ -50 
1D| 
-22 
3D| 
+ 34 
7 D 4 
-28 
5D| 
+ 26 
* The bracketed numbers represent double readings. 
r In Experiment 4 only half of the galvanometer was in circuit. 
The deflections given must he doubled in order to compare with 
the preceding experiments. 
