92 Mr. Tribe on the Influence of Strength 
strength of the current; and the electromotive force set up 
on the analyzers might consequently also be supposed to vary 
in the same way. .Now as the force required to overcome 
the affinity of the ions was constant, and as the electromotive 
force decreases from the ends of an analyzer in the position 
of the ones employed, it might be expected that the inter- 
medial space would decrease in proportion as the electro- 
motive force increased between the electrodes. That such a 
relation exists would appear to be fairly well established by 
the results of this series of experiments. In the annexed 
table the intermedial spaces are given in millimetres side by 
side with the numbers calculated on the supposition that the 
spaces vary inversely as the electromotive force of the elec- 
trolytic molecules. 
Current. 
Found. 
Calculated. 
0-4 
30 
30 
0-6 
18 
20 
0-8 
16 
15 
10 
12 
12 
1-2 
11 
10 
1-4 
10 
8-5 
1-6 
8 
75 
1-8 
7 
67 
20 
6 
6 
There are two other points brought out by these experi- 
ments to which I would direct attention. The one is the 
want of uniformity in the increase of the opposite electrifi- 
cations with the increase of current ; and the other is the 
remarkable constancy of the + electrification from one to two 
amperes. 
II. Influence of Strength of Electrolyte. — In this series of 
experiments the current was constant, one ampere being 
employed. The strengths of copper sulphate used for the 
several experiments are given in the annexed table of results. 
Percentage of 
— electrifi- 
Intermedial 
4- electrifi- 
4- referred to 
CuS0 4 . 
cation. 
space. 
cation. 
— as unity. 
1 
27 
7 
33 
114 
2 
25 
8 
34 
1-36 
4 
18 
12 
37 
205 
6 
15 
14 
38 
2-53 
8 
14 
16 
37 
2-64 
10 
12-5 
18-5 
36 
2-88 
12 
12 
22 
33 
275 
14 
10 
28 
29 
2-9 
.6 
95 
39-6 
28 
2-94 
