Vertical Component of Magnetic Force, 1845. 
21 
TABLE XXXVII. — List of Days in each Month of 1845 upon which the Vertical Component 
of Magnetic Force was least disturbed. 
Jan. 
Feb. 
March. 
April. 
May. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
s 
Dec. 1 
d. 
d. 
d. 
d. 
d. 
d. 
d. 
d. 
d. 
d. 
d. 
d. 
1 
1 
3 
1 
2 
2 
2 
7 
6 
1 
4 
1 
2 
3 
4 
2 
3 
3 
3 
11 
11 
3 
7 
5 
3 
4 
5 
4 
5 
6 
4 
12 
15 
6 
8 
6 
4 
7 
6 
5 
6 
7 
5 
13 
16 
7 
10 
8 
6 
8 
7 
7 
9 
12 
12 
14 
20 
8 
12 
9 
7 
10 
8 
11 
13 
13 
14 
16 
22 
11 
13 
10 
8 
11 
11 
12 
21 
14 
15 
19 
23 
13 
14 
11 
13 
12 
12 
17 
23 
16 
17 
20 
29 
15 
15 
12 
15 
14 
13 
22 
24 
17 
18 
21 
16 
19 
15 
17 
15 
28 
23 
26 
19 
21 
22 
17 
20 
16 
18 
17 
31 
27 
20 
22 
23 
18 
21 
17 
21 
18 
29 
21 
23 
27 
23 
22 
18 
31 
19 
23 
26 
24 
24 
19, 20 
25 
29 
27 
25 
22, 23 
26 
30 
30 
27 
24, 26 
27 
31 
28 
27, 29 
TABLE XXXVIII. — Hourly Means of the Balance Magnetometer Micrometer Eeadings corrected 
for Temperature, for the least disturbed days in each Month of 1845, corrected so that the Mean 
of each Monthly Series equals the true Monthly Mean. 
Mak. 
M. T. 
Jan. 
Feb. 
March. 
April. 
May. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
Year. 
h. 
Mic. Div. 
Mie. Div. 
Mic. Div. 
Mic. Div. 
Mic. Div. 
Mic. Div, 
Mic. Div. 
Mic. Div. 
Mic. Div. 
Mic. Div. 
Mic. Div. 
Mic. Div. 
Mic. Div. 
12 
588-3 
559-8 
542-7 
526-2 
513 
9 
496-6 
468-5 
454-4 
441-0 
421-0 
424-5 
428-8 
488-8 
13 
587-9 
558-3 
543-6 
528-0 
514 
6 
497-4 
468-4 
454-4 
439-9 
422-0 
424-3 
427-9 
488-9 
14 
587-5 
556-2 
545-1 
531-8 
516 
8 
499-9 
470-2 
456-5 
444-8 
423-5 
422-7 
426-0 
490-1 
15 
586-3 
556-8 
544-8 
533-3 
519 
5 
505-2 
472-0 
459-0 
444-7 
423-1 
422-7 
425-0 
491-0 
16 
585-3 
557-2 
545-0 
533-3 
523 
5 
510-6 
476-2 
463-2 
446-9 
423-2 
422-0 
424-0 
492-5 
17 
583-3 
557-5 
545-7 
534-5 
525 
5 
514-6 
478-1 
466-1 
447-3 
422-5 
422-3 
423-7 
493-4 
18 
584-5 
556-6 
546-3 
536-9 
525 
6 
517-8 
479-9 
469-7 
451-0 
423-2 
422-1 
425-0 
494-9 
19 
584-9 
557-1 
548-0 
542-1 
526 
8 
517-6 
477-6 
473-1 
457-5 
426-8 
423-6 
425-4 
496-7 
20 
586-3 
557-8 
550-5 
545-1 
522 
3 
517-0 
477-5 
470-0 
459-3 
429-0 
427-3 
427-0 
497-4 
21 
585-3 
557-9 
550-0 
543-9 
518 
3 
510-3 
473-3 
470-2 
458-7 
430-6 
428-0 
428-1 
496-2 
22 
587-8 
559-4 
448-5 
541-5 
512 
2 
501-9 
473-0 
465-3 
456-7 
428-6 
428-3 
428-1 
494-3 
23 
589-5 
559-1 
544-0 
534-1 
507 
3 
491-7 
466-3 
459-2 
454-0 
428-4 
431-3 
430-1 
491-2 
0 
589-7 
560-4 
540-8 
527-6 
503 
9 
488-7 
462-5 
457-6 
449-1 
428-9 
435-2 
432-4 
489-7 
1 
593-4 
561-7 
542-1 
529-8 
509 
4 
491-3 
463-2 
460-3 
454-8 
431-9 
437-5 
434-3 
492-5 
2 
596-6 
564-9 
545-7 
535-2 
515 
7 
494-9 
466-3 
465-8 
464-8 
438-0 
440-7 
439-3 
497-3 
3 
597-9 
569-3 
551-8 
538-7 
522 
6 
498-9 
473-6 
471-8 
470-1 
444-5 
442-0 
442-9 
502-0 
4 
598-0 
570-7 
556-0 
540-3 
526 
8 
504-6 
480-0 
476-5 
469-7 
448-9 
441-7 
441-6 
504-6 
5 
595-7 
569-8 
555-9 
541-1 
529 
6 
506-4 
483-4 
476-2 
464-8 
447-4 
439-9 
439-8 
504-2 
6 
595-2 
568-4 
553-8 
542-2 
529 
3 
507-7 
484-3 
471-7 
459-5 
443-7 
438-1 
439-2 
502-8 
7 
596-6 
566-4 
551-6 
542-9 
526 
2 
506-5 
482-8 
465-7 
454-9 
440-2 
436-3 
437-2 
500-6 
8 
595-8 
565-6 
551-8 
540-1 
523 
6 
505-5 
480-4 
462-5 
453-6 
436-2 
435-2 
435-2 
498-8 
9 
595-4 
565-1 
548-1 
537-3 
518 
8 
502-0 
476-1 
460-4 
452-3 
431-4 
432-3 
432-3 
496-0 
10 
591-7 
562-7 
545-7 
533-0 
515 
5 
498-4 
472-8 
458-3 
445-9 
428-1 
430-8 
432-2 
492-9 
11 
587-9 
559-6 
543-1 
528-3 
513 
4 
495-8 
468-7 
454-7 
439-7 
423-1 
428-3 
429-3 
489-3 
MAG. AND MET. 
OBS. 1845 AND 
1846. 
