ExtTrA OBSERVATIONS OF MAGNETOMETERS, DEcEMBER 8—11. 1843. 71 
DECLINATION. BIFILAR. BALANCE. DECLINATION, || BIFILAR. BALANCE. 
nee Min. Reading Min.| Reading |] Min. Reading eee Min. Reading Min. GE Min. Reading 
i of ineanesal of Cor- of Cor- ofl Reduced. of Cor- | of Cor- 
: Obs. Obs.] rected. || Obs.| rected. Obs. Obs.| rected. ||Obs.| rected. 
’ Me tt m. 2 v, m. Se. Div. m. Mie. Div. d. h. m. 4 £ m. Se. Div. m. Mic. Div. 
Dec. 8 6 | 30 | 25 22-05] 32 §00-5 33 911-9 | Dec. 10 13 5 | 25 11-19] 7 503-7 8 788-0 
" 35 21-88 || 37 502:3 38 916-0 10 12-27] 12 | -504-9 13 791-3 
40 21-91 || 42 501-2 || 43 916-0 15 13-17 || 17 505-7 18 790-6 
' 45 20-88 20 14-48 || 22 509-2 23 7924 
Dec. 8 8 0 17-88 || 2 502-8 3 947-9 25 15-37 || 27 506-6 || 28 793-0 
7 | 490-3 8 954-9 30 15-52 || 32 503-9 || 33 795-1 
10 13-61 || 12 493-1 13 946-7 35 15-56 || 37 503-3 38 797-1 
15 12-43 || 17 502-1 18 931-0 40 16-38 || 42 500-4 || 43 801-0 
20 15-12 || 22 500-6 || 23 923-0 45 16-91 || 47 500-4 || 48 803-3 
25 12-90 || 27 500-8 || 28 928-0 50 17-47 || 52 503-5 53 805-8 
30 11-98 || 32 496-1 33 927-0 55 17-88 || 57 504-1 58 806-3 
35 6-57|| 37 | 501-7 || 38 | 902-8 | Dec. 10 14 0 17-20|| 2] 502-3 3 | 802-1 
40 10-85 || 42 502-7 || 43 893-8 — 
45 15-79 || 47 501-4 || 48 883-8 | Dec. 11 6 0 | 25 22-72]) 2 513-1 3 869-3 
50 19-27 || 52 497-9 53 872-0 9 520-0 9 866-0 
55 25-68 || 57 491-4 || 58 860-7 12 20-60 
8 9 0 | 25 25-27|| 2 475-7 3 851-8 15 21-95 || 17 514-4 18 870-4 
5 | 25 18-85 7 467-2 8 861-3 35 24-44 || 37 520-0 || 38 865-2 
10 | 25 3-25] 12 478-7 1B} 854-1 40 25-14) 42 520-5 || 43 865-1 
15 | 24 57-12] 17 491-1 18 843-0 45 26-35 || 47 515-5 48 865-4 
20 | 24 56-15 || 22 494-5 23 841-8 50 25-12 || 52 514-9 || 53 864-3 
25 | 24 54-91 || 27 496-9 || 28 840-9 55 24-94 || 57 517-5 58 860-8 
30 | 24 56-73 | 32 503-3 33 841-0 | Dec. 11 7 0 23-50 2 517-3 3 859-5 
35 | 24 59-22]! 37 506-2 38 839-8 5 23-10 
40 | 25 2-53) 42 505-3 || 43 839-0 | Dee. 11 8 0 6-05 2 530-6 3 867-9 
45 | 25 5-73)| 47 499-0 || 48 840-8 5 7-11 7 529-0 8 865-0 
50 | 25 7-26] 52 493-5 53 844-5 10 8-51 || 12 529-8 13 860-0 
55 | 25 7-62)! 57 492-5 58 847-0 15 10-48 || 17 527-4 18 857-8 
8 10 0 | 25 8-23 2 494.4 3 851-2 20 12-43 || 22 526-6 23 855-7 
5 | 25 10-34|| 7 496-8 8 851-5 25 13-89 || 27 525-1 28 852-3 
10 | 25 13-14|| 12 498-5 Ti 853-1 30 15-41 || 32 525-4 33 848-5 
Dec. 11 10 0 19-34 2 510-6 3 852-5 
8 18 0 | 25 22-55] 2 530-7 3 816-0 10 18-06 | 12 507-6 13 856-4 
15 23-29 || 17 529-7 18 8155 15 17-59 || 17 510-0 18 855-7 
40 24-33 || 42 530-4 || 43 814-2 20 15-99 || 22 512-4 || 23 853-8 
25 15-16 || 27 513-3 28 855-2 
9 8 0|25 9-84|| 2 527-3 3 852-5 30 15-02 || 32 514-6 33 853-5 
5 12-80] 7 533-3 8 847-3 35 15-10 | 37 515-4 || 38 853-1 
10 14-40 || 12 536-2 13 839-6 40 13-89 || 42 516-5 43 849-2 
15 13-93 || 17 529-6 18 842-5 45 12-45 || 47 517-1 48 845-5. 
20 10-52 || 22 521-4 || 23 841-6 50 10-58 || 52 515-3 53 847-3 
25 8-20 || 27 528-8 || 28 836-7 55 11-05 || 57 518-4 || 58 844-8 
30 7-48 || 32 534-8 33 832-3 } Dec. 11 11 0 10-83}, 2 516-1 3 845-5 
35 10-25 || 37 533-8 38 833-8 5 11-35 if 514-5 8 845-0 
40 12-60 || 42 528-4 || 43 836-4 10 13-10 || 12 521-3 13 837-9 
45 15-72) 47-| 521-3 48 839-5 15 15-52 || 17 534.3 18 827-9 
50 15-39 || 52 518-0 || 53 839-3 20 20-41 || 22 535-4 || 23 818-9 
55 17-00 || 57 511-9 58 843-2 25 22-43 || 27 531-5 28 811-4 
9 9 0 17-96 2 509-7 3 845-5 30 23-68 || 32 521-8 33 808-0 
5 18-43 7 509-5 8 846-5 35 23-32 || 37 511-1 38 806-4 
9 10 0 18-15 2 510-4 3 849-0 40 20-32 || 42 507-0 43 802-0 
- a 45 16-28 || 47 512-7 || 48 794-2 
. 10 12 | 50 | 25 11-87} 52 495-8 53 778-6 50 13-96 || 52 515-1 53 793-7 
é 55 10-58 || 57 500-2 58 781-9 55 14-95 || 57 518-8 58 791-3 
10 13 0 10-41 2 503-7 3 783-0 | Dec. 11 12 0 16-01 2 525-4 3 788-7 
Biritar. k=0-0001300. BaLancE. k=0:000014 approximately. 
Biritark THERMOMETER. 46°°8 46°°8 46°-0 46°-0 48°-0 
BALANCE THERMOMETER. \ Bie ES { 47°.53 9° 9%, { 472.53 10% 180, { agg LON 1a, { a7o3 M12 11h, { 487-7" 
Dec. 102. (Sunday). It having been observed that the magnets were disturbed to-day, observations were commenced at midnight 
Monday morning). - 
5 ila 10% 20™. Auroral light to NNW. 
