OBSERVED IN THE WIRES OF THE ELECTRIC TELEGRAPH 
71 
Table I. 
Mean deflections in each hour exhibited by a galvanometer at Derby, in connection 
with a wire extending to Rugby, for fourteen days, commencing May 17, 1848. 
(The means are taken from twelve observations in each hour.) 
Rugby Instrument. 
Time. 
May 17 . 
May 18. 
May 19 . 
May 20. 
May 21 . 
May 22. 
May 23. 
Mean. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
L. 
R. 
1 A.M. 
2-42 
3-92 
2-71 
4-12 
0-14 
0-61 
2 
6-29 
5-37 
3-87 
2-21 
0-50 
3-65 
3 
4-'50 
5-87 
1-42 
3-87 
0-71 
0-91 
4 
2-50 
3-60 
« . • 
2-60 
1-17 
0-40 
0-38 
5 
1-83 
1-75 
1-58 
6-83 
0-71 
6 
1-50 
0-'25 
0-92 
2-83 
0-62 
7 
6-’45 
2-25 
0-21 
2-00 
1-12 
8 
3-09 
6-83 
6-66 
3-66 
3-56 
9 
5-66 
2-17 
1-87 
6-87 
2-21 
10 
4-16 
308 
1-46 
0-33 
3-75 
0-76 
11 
.... 
0-42 
2-50 
2-00 
3-69 
5-33 
2-50 
12 Noon. 
3-17 
5-08 
3-25 
... 
1-62 
508 
3-64 
1 P.M. 
5-17 
2-25 
1-79 
4-71 
2-42 
2-37 
2 
9-75 
2-42 
3-64 
6-'32 
1-08 
3-31 
3 
7-08 
0-33 
0-66 
2-17 
1-05 
1-99 
4 
9-ii 
9-60 
0-46 
d’so 
... 
2-54 
1-29 
4-58 
5 
7-12 
6-20 
6-25 
0-62 
2-12 
4-46 
6 
10-82 
11-33 
205 
3-46 
1-33 
4-98 
7 
3-12 
5-37 
10-42 
. . . 
4-25 
1-25 
3-63 
8 
7-83 
2-33 
5-58 
6-12 
3-08 
0-92 
9 
12-34 
2-50 
6-83 
1-00 
2-54 
3-62 
10 
12-12 
4-58 
4-25 
5-71 
2-00 
9-5 
11 
0-33 
5-73 
4-87 
6-42 
2-14 
1-84 
12 Midnight. 
3-29 
6-46 
6-04 
4-79 
0-00 
4-12 
Time. 
May 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. 
h . 
R. 
1 A.M. 
0-25 
0-25 
008 
4-79 
4-70 
1-81 
2 
2-40 
3-37 
0-41 
6-66 
1-08 
0-98 
3 
1-50 
6-41 
6-29 
3-04 
241 
2-73 
4 
5-62 
3-54 
0-95 
6-16 
2-25 
1-50 
5 
6-87 
3-41 
4-16 
2-75 
2-83 
1-77 
6 
4-08 
2-79 
5-79 
7-58 
2-12 
4-47 
7 
2-62 
3-45 
5-58 
12-41 
1-20 
5-05 
8 
1-04 
0-91 
3-83 
8-16 
4-41 
3-67 
9 
zero. 
108 
2-37 
4-33 
6-95 
2-51 
10 
1-29 
2-29 
1-33 
7-50 
11-08 
1-24 
11 
2-70 
4-16 
i-29 
i-33 
13-70 
4-63 
12 Noon. 
3-66 
4-62 
363 
6-83 
10-70 
5-88 
1 P.M. 
1-62 
3-79 
4-37 
4-75 
6-54 
7-70 
4-79 
2 
1-29 
1-68 
3-45 
3-87 
9-0 
13-56 
5-47 
3 
0-62 
0-12 
1-87 
1-62 
2-00 
8-70 
1-82 
4 
0-58 
1-41 
6-45 
6-62 
0-25 
4-58 
0-55 
5 
0-50 
1-28 
4-66 
2-45 
2-37 
6-95 
0-24 
6 
0-37 
0-16 
4-05 
1-22 
3-50 
6-93 
1-35 
7 
0-i2 
0-16 
3 62 
4-95 
4-08 
100 
0-34 
8 
0-04 
6-20 
2-54 
4-50 
4-41 
0-95 
0-21 
9 
0-95 
1-75 
1-66 
5-08 
4-33 
0-20 
1-36 
10 
2-37 
0-29 
1-95 
7-87 
2-75 
0-70 
1-53 
11 
0-54 
0-79 
6-29 
7-91 
2-58 
2-58 
1 05 
12 Midnight. 
0-29 
3-50 
6-08 
1-56 
1-12 
437 
0-26 
