MAGNETIC PHENOMENA AT THE IvEW OBSERVATORY. 
315 
Table II. — Ratios in 
each 
year to the mean 
annual value. 
Year ending 31st December 1859 . 
. 1*70 
99 
99 
18C0 . . 
. 1-15 
99 
99 
1861 . . 
. 0-71 
99 
99 
1862 . . 
. 1-13 
99 
99 
1863 . . 
. 0-55 
99 
99 
1864 . . 
. 0-75 
Table III. — Aggregate Values in the different years divided into disturbances 
increasing and disturbances decreasing the Force. 
Increasing. 
Decreasing. 
Year ending 31st December 1859 . . 
. . 402-525 
137"710 inches. 
1860 . , 
. . 250-629 
113-579 „ 
1861 . . 
. . 147-988 
78-637 „ 
1862 . . 
. . 248-391 
110-372 „ 
1863 . . 
. . 89-371 
85-341 „ 
1864 . . 
. . 107-248 
131-349 „ 
Total in the 6 years 
. . 1246-152 
656-988 „ 
The ratio of the values of the disturbances increasing the Force to those which de- 
creased it was, on the average of the 6 years, as l - 9 to 1. 
Table IV. — Aggregate Values of the disturbed observations distributed into the several 
months of their occurrence, with the ratios which the values in the preceding 
column bear to the mean monthly value or average of all the months. 
Months. 
Tears ending December 31. 
Sums in 
the 6 years. 
Ratios. 
Months. 
1859. 
1860. 
1861. 
1862. 
1863. 
1864. 
in. 
in. 
in. 
in. 
in. 
in. 
in. 
Jan. 
5-769 
6-174 
50-091 
57-532 
23-186 
4-885 
147-637 
0-93 
Jan. 
Feb. 
30-335 
35-492 
13-270 
29-385 
13-487 
37-106 
159-075 
1-00 
Feb. 
Mar. 
15-892 
39-871 
24-130 
60-527 
6-929 
19-932 
167-281 
1-05 
Mar. 
April 
53-598 
36-032 
12-550 
21-844 
1 1 -326 
21-197 
156-547 
0-99 
April 
May 
12-813 
27-417 
7-636 
12-023 
4-812 
17-412 
82-113 
0-52 
May 
June 
33-154 
16-388 
23-825 
1-236 
8-537 
19-621 
102-761 
0-65 
June 
July 
91-814 
32-996 
3 176 
22-071 
17-327 
27-676 
195-060 
1-23 
July 
Aug. 
26-156 
96-549 
20-396 
63-751 
14-793 
28-591 
250-236 
1-58 
Aug. 
Sept. 
94-594 
36-167 
13-045 
25-751 
33-503 
15-814 
218-874 
1-38 
Sept. 
Oct. 
62-074 
9-739 
17-688 
19-381 
21-074 
27-285 
157-241 
0-99 
Oct. 
Nov. 
24-404 
2-802 
13-060 
10-697 
15-777 
5-164 
71-904 
0-45 
Nov. 
Dec. 
89-632 
24-581 
27-758 
34-565 
3-961 
13-914 
194-411 
1-23 
Dec. 
Total in the 6 years 1903T40 
A/r .11 1 1903-140 
Mean monthly value — = 158-593= POO 
1 M 
Tables V. and VI. exhibit the aggregate monthly values in the different years sepa- 
rated into disturbances increasing and disturbances decreasing the Force. 
MDCCCLXXI. 2 X 
