380 
MESSES. C. AND E. CHAMBERS— PLANETARY INFLUENCE 
than -00334 (metre-gramme-second) units of force, and the increasing disturbance is that 
excess; and the disturbed observations decreasing the Horizontal Force are all those 
which give a value of Horizontal Force in defect of that average by more than -00334 
units, and the decreasing disturbance is that defect. In Table II. the aggregates of the 
excesses and defects of Horizontal Force are shown for each month in each of the 
twenty-six years from 1847 to 1872. The two Tables contain all the observational 
data used in the present inquiry. 
Table I. — Showing the Monthly Aggregates of Disturbances of Declination exceeding 
l'-4 in amount, from January 1847 to December 1872. 
Easterly Disturbance Aggregates. 
Jan. 
Feb. 
March. 
April. 
May. 
June. 
July. 
August. 
Sept. 
Oct. 
Not. 
Dec. 
1847. 
32-601 
9-313 
53-343 
81-730 
52-675 
31-843 
41-527 
69-892 
153-729 
108-458 
67142 
210-564 
j 1^48. 
52-444 
82-755 
84-714 
46-396 
25-086 
87-569 
87-888 
44-773 
15-669 
81-189 
233-638 
27-256 
1849. 
66-268 
94-313 
55-685 
30-832 
16-206 
16-850 
18-278 
32 054 
19-469 
53-973 
92-298 
20-561 
18710. 
28-997 
28-544 
34003 
15-067 
18-623 
16-777 
42-915 
21-585 
15-093 
8-540 
5-443 
82-517 
1851. 
74-813 
21 741 
13-837 
20-075 
20-990 
22-818 
35-098 
21-894 
90-523 
49-580 
18-995 
72-240 
1852. 
53-346 
129-985 
24-127 
74-522 
126-439 
14-392 
18-704 
34-921 
32-894 
16-508 
28006 
36853 
1853. 
32-650 
24-427 
42-940 
25-270 
67160 
39-312 
27-949 
36-882 
94-948 
19-424 
17-374 
38-480 
1854. 
50-902 
64-843 
56-504 
43-466 
10-708 
22-208 
31-258 
10283 
22-554 
44-416 
18-769 
22-813 
1855. 
13100 
7-185 
36-425 
19414 
8-449 
14-416 
13078 
10-702 
16-942 
14624 
14 734 
14 338 
1856. 
8054 
14-978 
10-926 
13-924 
1-665 
12-098 
5 052 
9-554 
21379 
15-433 
0000 
6-893 
1857. 
8118 
6-752 
20-732 
8-924 
10-489 
13 311 
33118 
12-057 
25-447 
20-650 
40-744 
96-264 
1858. 
49-958 
39-181 
64-664 
111-087 
18-894 
25-834 
77-967 
30-488 
43782 
44-923 
27-337 
15034 
1859. 
57-819 
69-377 
48-189 
97001 
52-618 
38-394 
57-820 
114162 
169-905 
198-777 
15-435 
49-717 
1860. 
23-984 
70715 
103117 
37-567 
17-695 
38-733 
140-932 
221-409 
64-623 
63-580 
11-436 
38-406 
1861. 
60-495 
56-850 
37678 
33-454 
19002 
41-033 
39174 
32-787 
47-383 
40-953 
35-443 
69-321 
> 1862. 
30153 
26-618 
179-782 
84-432 
27-592 
21-266 
51-978 
81-257 
55-343 
163152 
13-866 
55-289 
1863. 
62003 
39-771 
60-408 
56068 
56-448 
19-299 
27-583 
32-972 
27-227 
22576 
12 177 
0000 
1864. 
17-328 
32-728 
26-264 
27-672 
6-541 
80-336 
57-361 
40140 
39-891 
20-698 
5 020 
20-390 
1865. 
52-565 
27-247 
9-906 
39-858 
27211 
25-372 
53-231 
70072 
30-130 
41-462 
50-878 
13-940 
1866. 
30-095 
81-696 
16-635 
3-045 
17-569 
13 226 
3-059 
27-330 
12088 
31-926 
32-221 
8047 
1867. 
30-424 
15-881 
4-994 
2-875 
14-832 
11655 
16-841 
25 108 
21 224 
40-817 
27-571 
0000 
1868. 
6-695 
4-370 
16-389 
110-398 
5-117 
18-591 
13-281 
38-992 
55-874 
85-009 
7-087 
6-428 
1869. 
55-697 
43-308 
60-588 
75-824 
67-852 
52-912 
17095 
30-644 
116-304 
50-840 
17-692 
59-819 
1870. 
64-717 
57199 
70-171 
101-645 
77-381 
64-724 
33-539 
62-790 
79-164 
153136 
51-690 
45-709 
1871. 
8-155 
10-946 
9078 
15-883 
3-705 
5-598 
14-513 
11-408 
6-347 
6087 
12137 
2-614 
1872. 
3-818 
18-097 
8-803 
6006 
7109 
8-368 
10140 
14-941 
10-221 
31-311 
3-622 
6-856 
Westerly Disturbance Aggregates. 
1847. 
22-397 
7-678 
0000 
44-942 
27-333 
39-353 
28176 
40-743 
60-499 
31-620 
37967 
53-274 
1848. 
58-531 
54-526 
11-946 
27-527 
22-894 
33-295 
54 331 
53-568 
6-745 
46017 
81-873 
17-325 
1849. 
47-932 
29114 
51-404 
50760 
21-203 
39-349 
40-501 
49-756 
32347 
28-293 
26-837 
11-849 
1850. 
11-865 
62015 
13-427 
33-615 
39415 
11-933 
41-324 
24-019 
23114 
10-068 
4-772 
16-425 
1851. 
25-920 
26131 
16-060 
6148 
36-951 
48112 
40-230 
41-939 
26-847 
23-471 
7-637 
10-712 
1852. 
31093 
43-683 
19-581 
42 771 
21-890 
11 452 
39-386 
24-997 
35-918 
24-430 
28-512 
17105 
1853. 
71474 
2-889 
23612 
13-683 
35-860 
27-882 
26-281 
23-721 
24-766 
42-571 
6-748 
8-598 
1854. 
49-328 
6-672 
26-553 
9-388 
12-748 
34-806 
16006 
8.158 
8-245 
18-580 
12-791 
4-506 
1855. 
8-686 
14-803 
1-447 
13-382 
6-207 
30-243 
21-586 
23-924 
23 347 
5-025 
3191 
5-548 
1856. 
16100 
9-312 
0000 
7-282 
9-634 
6-364 
27-199 
6-584 
25-866 
3-252 
8-740 
3-050 
1857. 
36052 
12035 
5-744 
7974 
36-935 
12-845 
22012 
10-628 
97-241 
28-370 
13-757 
57011 
1858. 
48-242 
14-885 
36-986 
12-387 
18-998 
24157 
31-895 
35153 
61-432 
38-204 
32-387 
21-273 
1859. 
29-810 
31-247 
33086 
35 032 
54-457 
34145 
41192 
49006 
81-670 
43-294 
22-539 
45-387 
1860. 
45-737 
24-530 
59-494 
53-723 
46127 
39-309 
171-465 
59-967 
31-190 
35-831 
16-268 
23-089 
1861. 
23-738 
12-540 
28022 
44-486 
19-973 
36-941 
64-533 
31-395 
20-087 
45-476 
10-469 
10-644 
1862. 
24-502 
11-317 
39-491 
99-643 
20131 
35-380 
52-467 
36-508 
32-164 
96-376 
18-179 
19-360 
1863. 
45-074 
29-515 
24148 
35-883 
17075 
9-793 
28-931 
29-248 
10-118 
29-466 
12-512 
9-864 
1864. 
16-426 
21-826 
13-412 
17-374 
17-771 
19-065 
25-817 
37-766 
20-984 
9-253 
8-052 
6-418 
1865. 
12-802 
19-926 
11-832 
3-695 
48-677 
8-625 
25-480 
44-368 
38 070 
34-283 
3015 
3-355 
1866. 
36-845 
38-828 
17-246 
20-491 
205-299 
2-929 
17-898 
41-593 
6695 
70-411 
3-457 
2-902 
1867. 
14021 
6-881 
5-481 
3-156 
3-080 
1-811 
13-432 
23159 
21-280 
11-930 
3-073 
0-000 
1868. 
1-523 
14-104 
25 252 
34-643 
12-828 
20-381 
16-917 
19-469 
56-602 
149-506 
1-482 
0000 
1869. 
20-950 
6-277 
13-912 
32-983 
21-287 
21-938 
39-260 
20195 
55 086 
19-379 
8-246 
33-442 
1870. 
23-818 
19-064 
32187 
41-901 
54-201 
63-784 
90-833 
72-874 
40-028 
30-685 
42-759 
28-250 
1871. 
4-967 
6-338 
6090 
4-773 
3-473 
5-347 
6-644 
8-570 
4-551 
5-588 
3-172 
2443 
1872. 
2-720 
4-309 
5-640 
6-245 
4-697 
3-534 
2-892 
6-209 
4-559 
2-592 
4-422 
3-794 
