62 EXTRA OBSERVATIONS OF MAGNETOMETERS, APRIL 11—May 6. 1843. 
DECLINATION. BIFILAR. BALANCE. DECLINATION. BIFinaRr. BALANCE, 
Menges, |Min.| Reaaing |Min.| Reading | Min.| Reading Menngen, | 3tin.| Reading |Min-| Reading || afin.| Readi 
OU |! Gaspresat. ee Cor- || of Cor- WcO tal Mase ste tetaienl eon Cor- of 
Obs. Obs.| rected. || Obs.| rected. | Obs. |Obs.| rected. || Obs.| rected 
—— Wee a i 
a” Jh; ™m. ° g ™m. Se. Div. m. Mie. Div. GE wang | m. a 4 m. Se. Div. m. Mie. Di a 
Apr. 11 8 || 15 | 25 12-56) 17 | 534-3 | 18 | 723-6 Apr. 12 9 | 30 | 25 10-14) 32 | 536-7 || 33 | 746.9] 
30 15-30 || 32 | 535-9 || 33 726-0 35 8-87 || 37 543-9 || 38 | 739.9 
Apr. 11 9 || 35 21-64] 37 | 534-3 || 38 | 706-3 40 8-11|| 42 | 548-7 | 43 | 734694) 
Apr. 11 10 0 22-45] 2) 535-4 3 | 706-6 45 9-37 || 47 | 553-0 || 48 | 728-1 | 
—_|——_—_ 50 14:06 || 52 | 548-9 || 53 | 723.4 
Apr. 12 2 0 | 25 29-88] 2] 542-5 3 677-1 55 16:53 || 57 | 545-8 || 58 | 718-9 9) 
Apr. 12 3 | 45 28-23 || 47 | 561-6 || 48 | 680-7 | Apr. 12 10 0 18-55|| 2 | 542-2 3| 712 
50 28.47 5 19-86] 7] 538-9 || 8 | 709-07 
Apr. 12 4 0 28-07) 2] 559-5 3 | 690-1 10 21-34]/ 12 | 535-0 | 13 | 
15 27-43 || 17 548-4 || 18 696-4 15 22.52|/ 17 | 530-1 | 18 
Apr 12 5 || 45 30-05 | 47 | 560-6 || 48 740-2 20 22-18]| 22 | 528-8 || 23 
50 30:25] 52 | 555-1 |} 53 748-5 
55 33-54 || 57 533-3 || 58 | 767-1 | Apr. 13 18 0 | 25 21-71]| 2| 527-1 3 
Apr. 12 6 0 29-01) 9 534-4 3) 786-5 | Apr. 13 19 0 23-90|| 2] 509-6 3 
5 24-37 || 7 542-9 8 800-8 20 25:39]| 22 | 525-5 || 23 
10 16-:92|| 12 | 566-1 13 800-7 35 25-45 || 37 | 535-7 || 38 
| 15 24:17 || 17 557-7 || 18 | 810-1 | Apr. 13 20 0 22-50]| 2] 539-3 3 
20 23-16] 92 | 551-5 || 23 | 817-9 : 
25 21-91) 97 | 547-1 || 28 | 820.4 | Apr. 14 10 0 | 25 21-58]/ 2] 533-1 3 
30 21-86] 32 | 543-5 || 33 821-6 10 19-26]| 12 | 534-8 |) 13 
| 35 22-45] 37 | 543-9 || 38 826-5 15 19-22]| 17 | 535-3 | 18 
| 40 21-81] 42 | 546-6 || 43 | 822-9 |- 
45 23:71] 47 | 545-4 || 48 | 822-7 | Apr. 15 6 0} 25 17-51]| 2) 549-9 3 
50 24-20] 52 | 547-0 | 53 | 819-2 5 20-34]| 7 | 556-5 8 
55 26-17] 57 | 542-4 || 58 | 823.9 10 21-32] 12 | 552-7 || 13 
Apr: 1287, 0 24:99) 9) 541-7 3 | 825-4 | Apr. 15 8 0 23-30] 2] 542-0 3 
5 22.33) 7 537-8 8 822-1 
10 22.47 49 | 540-6 || 13 | 817-3 | Apr. 18 6 0 | 25 25-72] 2] 549-8 3 
15 22-85] 17 542-9 |} 18 | 811-5 25 25-39 || 27 | 558-3 || 28 
20 22:56 92 | 540-4 || 23 | 810-1 30 23-12|| 32 | 560-4 || 33 
25 21-62 || 97 541-4 || 28 | 807-4 35 24-38 || 37 561-5 || 38 
30 22:45 || 32 | 542-2 | 33 | 807-8 50 20-03 || 52 | 547-4 || 53 | 78222 
35 23-32 || 37 538-6 || 38 808-3 55 16-97 || 57 545-3 || 58 
40 23-36 || 42 | 533-5 || 43 | 807-6 | Apr. 18 7] 0 15-72|| 2] 544-3 3 
45 21-37 || 47 537-4 || 48 | 802-3 5 10-58 || 7 | 544-2 8 
| 50 21-73) 52 | 545-7 || 53 | 797-6 10 11-80 || 12 | 547-9 || 13 | 788: 
55 23-17 || 57 539-3 || 58 | 801-7 15 13-42 || 17 549-6 || 18 | 780 
Apr. 12 8 0 23:07) 2| 537-0 3 | 800-7 20 15-12]| 22 | 554-1 || 23] 770 
5 20-90 || 7 538-0 8 804-3 25 16-87 || 27 | 554-8 || 28 | 763: 
10 18-18 12 | 537-6 || 13 806-2 30 19-04 || 32 | 558-0 |) 33 
15 13-07 || 17 538-5 || 18 | 799-6 35 20-30 |) 37 555-1 || 38 | 749 
| 20 13-34] 99 | 538-8 || 23 | 792.3 | Apr. 18 8 0 20-57||} 2| 554-1 3 | Wa 
25 15-14) 97 | 539-7 | 28 | 787-1 a A pan 
30 15-64|| 32 | 534-4 || 33 794.4 | May 6 6 0 | 25 24-96] 2] 516-6 3 
35 15-34] 37 | 535-4 | 38 | 778-8 | May 6 8 || 0 | 25 21-64] 2] 518-0 3 
40 ~ 15-83] 42 | 537-2 || 43 | 769-9 | May 6 9 | 40 | 24 58.08]) 42 | 437-2 || 43 
45 16-78 || 47 | 534-5 | 48 | 766-0 45 | 24 50-67|| 47 | 443-8 || 48 
50 17-41] 52 | 525.4 || 53 | 770-0 50 | 24 51-59] 52 | 440-0 || 53 | 48 
55 14-15 || 57 528-8 | 58 | 769-5 55 | 24 57-94] 57 | 448-5 || 58 | 46 
Apr. 12 9 0 13-68] 9 524.7 3 473.0 | May 6 10 0} 25 4-10] 2 422.7 3 
5 10-21] 7] 524.9 8 | 771-5 5 | 25 6-70] -7 | 392-7 8 
10 6-88 || 12 | 529-5 || 13 | 761-4 10 | 25 6-91|| 12 | 416-6 || 13 
15 8-46 | 17 529-8 18 759-6 151) 325) o-63)|| a 406-0 | 18 
20 9-99|| 22 | 525-8 || 23 | 757-2 20 | 25 4-89] 21 374-7 
25 9-17 || 27 529-6 || 28 | 753-5 22 | 370-8 || 23 
Birizar. Before April 27, k=0-0001248 ; after April 27, =0-0001205. BaLancEr. k=0:000015 approximately. 
BiriLarn THERMOMETER. 
BALANCE THERMOMETER, 
\ April 124 74, vets 18% 7h, {eine 
rf 
May 64. Quite cloudy throughout this disturbance, but the aurora was observed near London by Sir J. Herschel, and described by hi 
in the Athenzum, No. 811. 
