57 
6^d. for Daniel's, and 8d. per hour for Grove's. I do not 
take into account the product of zinc, for I believe it to be 
nearly worthless. 
APPENDIX. 
The column E denotes the electromotive force as ascertained by the intensity, or 
100 feet coil of the galvanometer. 
The column F denotes the force as ascertained by the quantity, or 10 feet coil of 
the galvanometer. 
The numbers in column R are the battery resistances, as measured by feet of 
copper wire, No. 20, Birmingham gauge. 
Where two sets of numbers are given in the same column, the first is the indi- 
cation on first contact ; the second after the force had declined ; the letter d 
also indicates that the force declined. 
§2 
° 
P H 
q 
w 
H 
p 
a 
Zinc 
Zinc amalg 
Tin 
Iron 
Bismuth... . 
Copper .... 
Lead 
Antimony . 
Silver 
Zinc 
Zinc amalg. 
Tin 
Lead 
Iron 
Antimony . 
Copper .... 
Bismuth.... 
Silver 
Zinc 
Tin 
Bismuth.... 
Antimony 
Silver 
Zinc 
Zinc amalg 
Iron 
Lead 
Tin 
Copper .... 
Silver 
E 
16.2 
16.0 
11.6 
11.2 
7.5 
7.2 
7.0 d 
7.0 d 
3.5 
F 
92.0 
90.0 
69-0 to 50.0 
67.0 
32.0 to 5.0 
41.5 d 
0.5 
2.0 
4.0 to 1.0 
E 
19.5 
19.2 
16.0 
13.4 d 
12.8 
12.5 
8.2 
8.0 d 
4.8 d 
F 
10.0 to 
6.0 to 
25.0 to 
10.0 to 
10.0 to 
6.0 
5.0 to 
5.0 to 
5.0 to 
3.0 
1.5 
3.0 
2.0 
5.0 
2.0 
1.0 
3.0 
CQ O 
E 
17.5 
12.5 
9.1 
8.1 
8.1 
76.0 to 62.0 
52.0 
48.5 
1.5 
3.5 
n 
Ph u 
w 
z £ 
S o 
HO 
P 
o o 
co 
£ H Z 
O <« O 
£ S s 
o 2 s 
g g< 
P u 
o 
CO 
E 
8.8 
8.5 
4.1 
4.1 
3.9 
1.3 
0.4 
F 
20.0 
17.0 
8.5 
8.0 
1.0 
1.0 
1.0 
