MR. DANIELL ON VOLTAIC COMBINATIONS. 
151 
phenomena of the battery with its usual charge. The results of the latter are shown 
in the following Tables : 
Time. 
Interval. 
Voltameter. 
5 min. rate. 
Galvanometer. 
h m 
3 7 
3 12 
5 
5 
5 
Cell 1.— 42i°E. 
3 17 
10 
10 
5 
Cell 2.-45 E. 
3 22 
15 
15 
5 
Cell 3.-45 E. 
3 27 
20 
19i 
Cell 4.— 4 ?\ E. 
3 32 
25 
24* 
4| 
Cell 5. — 47^ E. 
Circuit completed by short wire. 
Cell 1.-25° W. 
Cell 2.— 30 W. 
Cell 3.— 30 W. 
Cell 4.— 30 E. 
Cell 5.— 30 E. 
The assisting action of the sulphate of copper was thus found to have increased 
the decomposing power of the battery current from T1 cubic inch to 5 cubic inches., 
and the force of the secondary current, as measured by the deviation of the galvano- 
meter, from 40° to 47°. 
From these experiments we find that when the course of the main battery current 
is obstructed by causing it to pass through the long wire of a galvanometer, or 
through the electrolyte of a voltameter, the course of the secondary current from 
each separate cell is always normal, or in the same direction ; but that when the bat- 
tery current is allowed to flow with the least possible resistance, as by completing 
the main circuit by a short wire, the secondary current of the separate cells becomes 
opposite. Hence it might be inferred that the resistance might be so adjusted as 
that the secondary current should altogether disappear, or vary between the two di- 
rections. To ascertain the effect of different degrees of resistance, the following ex- 
periments were made. 
A galvanometer was included in the main circuit of the battery, formed of a wire 
one twentieth of an inch in diameter and thirty-two feet in length : this we will de- 
signate as No. 1. An extra connection was also made of the circuit by means of a 
wire of the same thickness, fifty-three feet four inches long. The diameter of the 
wire forming the battery connections was one seventh of an inch. A secondary cir- 
cuit was also formed from a single cell through another galvanometer, which we will 
call No. 2. 
The deviation of No. 1. was 70° E. 
No. 2. — 40 E. 
and both the needles were perfectly steady. 
When the extra connection was reduced to half, or twenty-six feet eight inches, 
