60 Extra OBSERVATIONS OF MAGNETOMETERS, APRIL 6—11. 1843. 
DECLINATION, BIFILaR. BALANCE, DECLINATION, BIFiLar. BALANCE, — 
Mean ‘ime. Min.| Reading || Min.| Reading Min.| Reading Bon tn Min.! Reading || Min.| Reading | Min.| Reading 
of | Reduced. || of Cor- | of Cor- of | Reduced. |) of Cor- of Cor- 
Obs. Obs. | rected. | Obs.| rected. Obs. Obs.| rected. || Obs.| rected. 
a2) bs m. 2: is m. Se. Div. ad. h. || om. ° / m. Se. Diy. m. Mic. Div, | 
Apr. 6 12 5 | 25 13-55] 7 | 503-5 Apr. 6 16 37 | 493-2 | 38 | 549.0 
10 12-63 || 12 | 504-4 40 | 25 27-16) 42 | 499-4 || 43 551-9 
15 11-12] 17 | 513-3 45 28-54|| 47 | 504-4 | 48 | 552-6 
20 10-48 | 22 521-5 52 509-9 | 53 | 549.4 
25 11-15 || 27 | 527-4 55 28-00) 57 | 515-6 | 58 | 547.1 
30 11-89 || 32 529-5 Apr. 6 17 0 27-43 || 2 519-9 3} 547-0 
35 12-07 || 37 531-4 5 26-79|) 7 | 521-1 8 | 549-6 
40 12-16 | 42 | 529-1 25 22-62|| 27 | 529-5 | 28] 563-8 
45 12-50|| 47 | 523-5 30 23-70], 32 | 524-5 | 33 | 572-7 
50 13-10] 52 | 523-2 45 21-58] 47 | 527-1 || 48 | 592.2 
55 13-61]| 57 | 521-0 55 21-86 57 | 527-0 | 58 | 602-9 
Apr. 6 13 0 14-51] 2 518-5 Apr. 6 18 0 21-68) 2) 527-6 3 | 607-8 
20 14-72] 22 | 512.4 Apr. 6 19 || 10 22-05] 12 | 529-2 | 13 | 643. 
25 14-49 || 27 510-7 Apr. 6 20 0 21-91]/ 2] 530-1 3 | 659-3 
30 14-16 || 32 509-4 a 
35 14-31] 37 | 508-3 Aprew 7) 16 0 | 25 20-47] 2) 538-8 3 | 765- 
40 14:16] 42 | 503-2 5 20-70|| 7 | 549-0 8 | 763-2 
45 14-23] 47 | 495-8 10 22:45] 12 | 543-8 | 13 | 762-8 
50 16-21]| 52 | 483-5 15 23.29|| 17 | 546-4 | 18] 760. 
55 22-09) 57 | 460-1 Apr. 7 8 0 19-10|| 2 538-7 3 | 743-9 
Apr. 6 14 0 30-89] 2] 452-1 10 11-53|| 12 | 555-4 || 13 | 726-4 
5 35-86] 7 | 424-9 15 3-58] 17 | 576-2 || 18 | 709.3 
10 41-22] 12 | 422.3 20 7-83 || 22 | 586-4 || 23 | 703-0 
14] 442-9 25 12-74|| 27 | 576-4 | 28 | 703-9 
15 42.21] 16 | 429.2 30 14-87 || 32 | 570-5 || 33 | 702-1 
17 | 420-4 35 18-48 || 37 | 558-2 || 38] 7013 
19 | 434-4 40 19-33 || 42 | 548-8 | 43 | 699-3 
20 38-95 45 20-41] 47 | 543-7 | 48 | 699-2 
22] 449.2 50 20-74|| 52 | 537-3 || 53] 698: 
29} 511-7 55 20-67|| 57 | 532-5 | 58 | 696-8 
30 25-93 |) 31 514-9 Apr. 7 9 0 19-09 || 2] 526.7 3 | 696: 
32 515-5 5 16-91] 7 | 527-2 8 
34 517-0 10 14-48] 12 | 527-8 || 13 
35 27-02) 37 | 520-2 15 12-48 || 17 | 532.3 | 18 
40 27-31 || 42 524-8 20 12-16 || 22 | 534-0 || 23 
45 27-70) 47 | 532-5 25 12-74|| 27 | 532-1 | 28 
50 29-06 | 52 524-6 30 12-70 || 32 530-1 | 33 
55 28-37 || 57 | 519-5 50 15-22 || 52 536-5 || 53 
Apr. 6 15 0 27-29] 2 508-8 Apr. 7 10 0 18-73 || 2] 536-4 3 
b) 23-59|| 7 | 511-3 
10 20-84] 12 | 511-0 Apr. 7 18 0 | 25 23-90) 2) 544-5 3 | 626-0 
15 18-15 || 17 | 508-6 15 24-80] 17 | 538-6 | 18 | 6309 
20 15-39 || 22 | 505-8 = a F 
25 12-09 || 27 | 508-7 Apr. 8 4 0 | 25 29-24) 2] 542-9 3 | 7163 
30 10-48 || 32 | 510-9 Apr. 8 5 || 55 15-76 || 57 | 557-9 | 58 i! 
35 10-21 || 37 | 509-0 Apr. 8 6 0 16-62|) 2] 561-0 3 
40 10-41 |) 42 | 510-0 10 17-20] 12 | 559-5 | 13 
45 11-12 || 47 510-4 25 18-80 || 27 | 546-0 || 28 
|| 50 12-16 |) 52 507-0 30 18:55 | 32 | 546-5 || 33 
Apr. 6 16 || 0 11-98] 2] 510-7 35 19-83 
| 10 15-66 | 12 | 502-2 IN aE Z|) AO 22.58| 2| 541-1 | 3] 7736 
15 18-01} 17 | 496-6 Apr. 8 8 0 20-67|| 2] 543-2 3 | 7567 
20 19-80 | 22 | 492-9 f = 
25 22-29! 27 | 492-5 Apr. 11 8 0 | 25 16-10) 2} 527.4 3 
30 24-77 || 32 | 488-2 10 12-87] 12 | 533-2 || 13 
Biriar. k=0:0001248. Bavance. k=0:000015 approximately. f 
Birivan THERMOMETER, ; i 48° 48°-2 47°°8 47°-2 47°75 
BALANCE ta aed a ARPS EIS fo Ge lats { rete sols { 4g°,33 9° 16%, {ies OE Sieh { 4g°-g3 7° 19%, { pc 
April 74, 
See notes on the Aurora, p. 61. 
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