158 
MR. DANIELL ON VOLTAIC COMBINATIONS. 
Time. 
Interval. 
Voltameter. 
5 min. rate. 
h m 
11 11 
✓ 
Cubic inches. 
Cubic inches. 
11 16 
5 
17 
5 
11 21 
5 
21| 
42 
Galvanometer. 
55 E. 
The cover of the steamer was next put on, and the connections made as before by 
the electrodes passing through the cocks. 
Time. 
Interval. 
Voltameter. 
5 min. rate. 
Galvanometer. 
h 
m 
/ 
Cubic inches. 
Cubic inches. 
o 
11 
40 
11 
45 
5 
6"5 
6-5 
60 E. 
Connection was again 
made from 
the tin (cover) 
to the zinc 
cup. 
Time. 
Interval. 
Voltameter. 
5 min. rate. 
Galvanometer. 
h 
m 
t 
Cubic inches. 
Cubic inches. 
o 
11 
50 
5 
1T5 
5- 
55 E. 
11 
52 
The 
steam was turned on. 
11 
57 
5 
19* 
7-5 
65 E. 
12 
2 
5 
27- 
8- 
67‘5 E. 
12 
7 
5 
se- 
9- 
70 E. 
12 
9 
12 
14 
5 
ll- 
IT 
77 E. 
12 
19 
5 
21-5 
10-5 
The tin was again connected as before. 
Time. 
Interval. 
V oltameter. 
5 min. rate. 
Galvanometer. 
h 
m 
/ 
Cubic inches. 
Cubic inches. 
O 
12 
24 
5 
25- 
35 
40 E. 
12 
29 
5 
stopped. 
0 
Now we may observe that in this arrangement the extra current, which we have 
already found completing its circuit, according to circumstances, either to the zinc 
or copper of the battery, has a path open to it by the wire F G to the zinc of No. 2, 
or through the galvanometer and voltameter by the wire B A to the copper of No. 3, 
the latter being in opposition to the battery current. That in this series of experi- 
ments it tended to pass in the latter direction, is proved by the gradual retardation 
and ultimate neutralization of the latter. When the resistance to the main current 
was diminished by throwing the voltameter V out of the circuit by a wire passing 
from H to I, it again passed in the regular course, turning the needle of the galva- 
nometer to the E. 
When the secondary connection was made with the tin by the copper cup C of the 
galvanometer, instead of the zinc cup, the battery current through the voltameter 
was again stopped, but the needle of the galvanometer turned 80° E., indicating a 
powerful current through it in the normal direction. 
These experiments were frequently repeated with the same results. 
In attempting to account for all the variable phenomena of these extra and diverted 
