72 
MR. W. H. BARLOW ON SPONTANEOUS ELECTRICAL CURRENTS 
Table II. 
Mean deflections in each hour exhibited by a galvanometer at Derby, in connection 
with a wire extending to Birmingham, for fourteen days, commencing May 17, 1848. 
(The means are taken from twelve observations in each hour.) 
Birmingham Instrument. 
Time. 
May 17 . 
May 18. 
May 19 . 
May 20. 
May 21 . 
May 22. 
Blay 23. 
Mean. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
1 A.M. 
3-21 
2-00 
15-92 
1-80 
13-24 
4-12 
5-04 
2 
3-75 
5-25 
1-50 
6-02 
6-25 
... 
5-66 
4-74 
3 
11-37 
14-50 
5-66 
0-50 
10-75 
5-16 
2-15 
4 
8-10 
2-50 
6-50 
.3-83 
6-25 
4-30 
0-71 
5 
7-04 
9-25 
710 
8-25 
2-25 
• •• 
2-58 
6 
• •• 
• •• 
4-29 
4-75 
5-60 
1-85 
8-16 
1-19 
7 
0-66 
4-25 
5-83 
6-58 
7-50 
3-53 
8 
10-66 
15-16 
8-60 
3-50 
12-22 
10-03 
9 
9-50 
4-33 
1-25 
8-42 
0-42 
4-78 
10 
3-66 
5-60 
0-92 
6-75 
12-33 
1-32 
11 
4-83 
4-21 
5-83 
11-92 
18-70 
... 
9-10 
12 Noon. 
15-29 
16-37 
11-25 
6-16 
16-21 
13-06 
1 P.M. 
15-79 
6-50 
7-92 
18-88 
10-41 
11-90 
2 
18-92 
11-80 
15-21 
3-66 
8-10 
11-54 
3 
19-42 
... 
7-12 
5-00 
13-54 
5-88 
... 
10-19 
4 
22-60 
22-85 
14-46 
14-75 
12-10 
8-66 
... 
15-80 
5 
19-85 
3-10 
1900 
12-17 
3-50 
12-08 
11-61 
6 
22-21 
18-04 
17-46 
6-61 
... 
10-42 
5-73 
... 
12-31 
7 
2-54 
• •• 
10-12 
15-71 
1112 
17-33 
7-00 
... 
9-79 
8 
13-83 
i-66 
10-33 
8-87 
16-08 
11-62 
5-23 
9 
20-08 
2-65 
0-01 
12-83 
0-25 
9-42 
4-31 
10 
13-71 
4-71 
4-75 
7-60 
10-16 
7-83 
• •• 
0-30 
11 
1-83 
7-00 
6-'50 
12-83 
204 
7-42 
1-02 
12 Midnight. 
2-16 
4-10 
24-42 
10-30 
10-83 
304 
9-14 
Time. 
l\Iay 24. 
May 25. 
May 26 . 
May 27 . 
May 28. 
May 29 . 
May 30. 
Mean. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
1 A.M. 
0-20 
0-54 
0-83 
3-58 
3-87 
1-50 
2 
1-79 
3-04 
0-75 
6-20 
0-83 
0-69 
3 
0-75 
6-08 
zero. 
1-50 
1-16 
1-43 
4 
4-12 
0-75 
0-50 
6-70 
1-00 
0-73 
5 
4-29 
1-62 
1-79 
3-50 
2-04 
0-43 
6 
1-70 
0-79 
2-79 
6-29 
4-91 
3-29 
7 
0-62 
... 
1-54 
3-04 
10-79 
6-91 
... 
4-58 
8 
0-12 
6-04 
1-79 
5-91 
8-66 
• •• 
3-28 
9 
zero. 
1-04 
0-75 
3-58 
8-25 
2-30 
10 
• •• 
1-20 
2 16 
0-37 
6-64 
5-37 
0-34 
11 
2-46 
4-37 
0-79 
1-54 
6-87 
3-20 
12 Noon. 
• •• 
3-79 
5-08 
4-18 
5-83 
4-50 
4-67 
1 
4-66 
4-33 
5-62 
5-33 
6-04 
2-41 
4-73 
2 
3-71 
2-16 
5-33 
4-62 
10-00 
6-00 
... 
5-30 
3 
0-87 
1-02 
4-58 
2-41 
3-35 
3-95 
2-69 
4 
0-37 
0-25 
2-54 
1-25 
2-45 
1-25 
1-35 
5 
0-10 
0-28 
2-33 
0-25 
4-83 
3-54 
1-11 
6 
1-04 
2-00 
2-25 
3-86 
7-35 
2-50 
2-41 
7 
1-04 
1-62 
0-29 
8-29 
i-66 
2-66 
1-06 
8 
0-83 
1-37 
0-29 
7-16 
1-08 
2-25 
0-95 
9 
1-71 
2-70 
6-08 
2-83 
1-70 
2-62 
... 
0-44 
10 
3-00 
0-75 
6-’37 
6-04 
6-’33 
1-83 
0-69 
11 
0-70 
1-29 
i-37 
7-87 
1-91 
1-33 
... 
1-29 
12 Midnight 
... 
0-45 
3-’20 
2-91 
0-62 
1-25 
0-20 
0-32 
