978 MESSRS A. WALLER AND A. DE WATTEYILLE ON THE INFLUENCE 
the above results may be thus summed up :— 
1. K.C.G > A.C.O. 
2. A. O.C. > K.O.C. 
3. K.C.C. during K.D. > K.C.O. 
4. A.C.C. during A.D. > A.C.C. 
5. A.O.C. „ A.D. < A.O.C. 
6. K.O.C. „ K.D. < K.O.C. 
7. Increase of K.C.C. with K.D. > Increase of A.C.C. with A.D. 
8. Diminution of A.O.C. with A.D. > Diminution of K.O.C. with K.D. 
These statements are illustrated in Tracings 35 and 36, with the exception of 
statements 6 and 8, which we have verified, but of which it is difficult to obtain a good 
record. 
Minimum Exciting Strength of a Galvanic Current Added to or 
Subtracted from a Pre-existing Galvanic Current. 
We determined the strength of current necessary to produce minimum contraction 
with polarising currents of increasing strength. The experiments were made on the 
peroneal nerve, with and without additional resistance in circuit, and are embodied in 
the following table :— 
First appearance 
on tracing of 
Number of cells of testing current, 
(without additional resistance.) 
Number of cells 
of polarising current. 
a. 
6. 
c. 
K.C.C. . . . 
9 
9 
7 
0 
8 
8 
,. 
2 
7 
7 
5 
4 
6 
6 
. . 
6 
5 
5 
3 
8 
4 
4 
. . 
10 
3 
3 
2 
12 
3 
3 
,. 
14 
2 
2 
a a 
16 
A.C.C. . . . 
10 
10 
9 
0 
8 
9 
., 
2 
8 
8 
7 
4 
7 
7 
.. 
6 
6 
6 
5 
8 
5 
5 
# • 
10 
4 
4 
4 
12 
3 
3 
a • 
14 
