MAGNETIC PHENOMENA AT THE KEW OBSERVATORY. 
311 
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 
(or the sums in the 7 years) bear to the mean monthly value, or average of all the 
months. 
Months. 
Years ending December 31. 
Sums in 
the 7 years. 
Ratios. 
Months. 
1858. 
1859. 
1860. 
1861. 
1862. 
1863. 
1864. 
in. 
in. 
in. 
in. 
in. 
in. 
in. 
in. 
Jan. 
3-557 
15-969 
8-204 
42-588 
12-846 
17-974 
1-071 
102-209 
0-80 
Jan. 
Feb. 
24-035 
25-711 
16-041 
28-481 
8-217 
11-089 
5-256 
118-830 
0-93 
Feb. 
Mar. 
44-388 
10-497 
38-120 
18-924 
7-195 
9-491 
8-643 
137-258 
1-08 
Mar. 
April 
43-457 
39-991 
26-714 
11-169 
5-330 
10-599 
7'420 
144-680 
1-14 
April 
May 
32-268 
14-661 
16-990 
7-610 
6-146 
5-511 
10-646 
93-832 
074 
May 
June 
18-750 
17-897 
12-773 
7-080 
5-458 
5-473 
21-756 
89-187 
0-70 
June 
July 
17-574 
29-487 
39-631 
17-260 
14-758 
11-538 
11-901 
142-149 
1-12 
July 
Aug. 
7-569 
45-249 
62-801 
12-501 
37-801 
12-265 
15-440 
193-626 
1-52 
Aug. 
Sept. 
12-472 
61-234 
16-212 
8-772 
13-781 
10-823 
9-438 
132-732 
1-04 
Sept. 
Oct. 
26-163 
40-283 
13-188 
20-996 
35-139 
8-395 
10-029 
154-193 
1-21 
Oct. 
Nov. 
9-050 
31-288 
5-223 
13-239 
8-395 
9-364 
7-949 
84-508 
0-66 
Nov. 
Dec. 
28-610 
37-019 
14-452 
18-128 
28-579 
2-120 
5-176 
134-084 
1-05 
Dec. 
Total in 
the 7 yeai 
S 
1527-288 
Mean monthly value = 
127-274 = 
1*00 
Tables V. and VI. exhibit the aggregate monthly values in the different years sepa- 
rated into disturbances increasing the Force and disturbances decreasing the Force. 
Table V. — Disturbances increasing the Force. 
Months. 
Years ending December 31. 
Sums in 
the 7 years. 
Ratios. 
Months. 
1858. 
1859. 
1860. 
1861. 
1862. 
1863. 
1864. 
in. 
in. 
in. 
in. 
in. 
in. 
in. 
in. 
Jan. 
1-345 
1-675 
1-655 
1-566 
0-818 
1-115 
0-158 
8-332 
0-28 
Jan. 
Feb. 
5-731 
1-594 
0-625 
2-222 
0-287 
0-942 
0-355 
11-756 
0-39 
Feb. 
Mar. 
10-289 
1-916 
4-637 
2-690 
0-340 
0-743 
1-205 
21-820 
0-72 
Mar. 
April 
1 2*252 
5-593 
7-812 
2-625 
0-824 
4-148 
1-691 
34-945 
1-16 
April 
May 
13-791 
7-276 
11-926 
4-711 
3-229 
2-441 
3-437 
46-811 
1-55 
May 
June 
10-861 
6-379 
4-447 
3-158 
4-563 
2-575 
3-596 
35-579 
1-18 
June 
July 
9-368 
6-879 
14-452 
1-029 
4-111 
2-578 
3-584 
42-001 
1-39 
July 
Aug. 
1-929 
4-862 
33-578 
3-809 
14-774 
2-667 
1-947 
63-566 
2-11 
Aug. 
Sept. 
3-175 
13-568 
4-281 
2-035 
8-273 
2-317 
1-106 
34-755 
1-15 
Sept. 
Oct. 
2-793 
7-885 
1-253 
1-561 
4-321 
0-493 
1-252 
19-558 
0-65 
Oct. 
Nov. 
1-792 
10-238 
0-301 
0-300 
1-816 
0-654 
1-162 
16-263 
0-54 
Nov. 
Dec. 
1-623 
17-391 
1-147 
1-515 
2-986 
0-519 
0-939 
26-120 
0-87 
Dec. 
Total in 
the 7 years 
361-506 
,, ,ii , 361-506 
Mean monthly value 
J 12 
30-125 = 
1-00 
