56 Extra OBSERVATIONS OF MAGNETOMETERS, Marcu 21—Apnit 5. 1843. 
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DECLINATION. BIFILAR. BALANCE. DECLINATION. Birivar. Batance, | 
erie Min Reading Min.) Reading || Min. Reading Mere = Reading Min.| Reading | Min.| Reading | 
of | Reduced. || of Cor- of Cor- iY Reduced. of Cor- of Cor- 
Obs. Obs.| rected. Obs.| rected. Obs. Obs.| rected. ||Obs.| rected. | 
a. oh. mse % / m Se. Div. m. | Mic. Diy. ad, 4h. om Ps hk m. Se. Div. m. | Mic. Di 
Mar. 21 23 25 25-95|| 2 528.4 3 694-1 | Mar. 29 9 ||55 | 25 13-34] 57 524-3 ||58 666 | 
Mar. 29 10 | 0 6-44 || 2 550-5 3 678-9 } 
Mar. 22 0] 0 | 25 30-43| 2| 527-0 | 3] 688-4 5 1-59 7 | 547-7 | 8 | 
5 28-97|| 7) 520-5 s| 690-8 10 1-63 | 12 547-3 | 13 
25 29-31|| 27 | 527-5 || 28 | 687-9 15 3-79) 17 | 555-5 | 18 
40 29-80|| 42 | 536-5 || 43 | 682-1 20 10-11 22 | 554.6 | 23 
45 30-18 || 47 | 536-9 | 48 | 682.9 25 14:78) 27 | 540-1 | 28 
Mar. 22 1 | 40 34-09|| 42 | 544-9 || 43 | 682-9 30 17-00 | 32 | 526-1 
45 35-08] 47 | 545-6 | 48 | 683-9 40 17-0042 | 505-9 | 43 
Mar. 22 2] 0 35-67] 2| 548-3 | 3] 685-8 45 11:93 )47 | 507-9 | 48 
20 34-48 || 22 | 544.6 | 23] 692-5 50 556/52 | 517-2 | 53 
30 36-51|| 32 | 558-0 | 33 | 691-9 55 217/57 | 524-0 | 58 
35 36-95|| 37 | 554-0 || 38 | 691-2 | Mar. 29 11 || 0 1-09 2 | 532-0 | 3 
40 35-15 42 | 544-9 || 43 | 699-0 5 1-98 
45 34-85] 47 | 540-9 || 48 | 700-1 10 5-70} 12 | 529-8 | 13 
50 34-73 || 52 | 535-4 || 53 | 703-8 15 8-37||17 | 524-7 18 
55 35-77] 57 | 530-9 || 58 | 706-2 20 855/22 | 528-2 | 23 
Mar. 22 3] O| + 36-16] 2) 525-9 || 3] 711-5 25 8-80} 27 | 532-4 | 28 
ol 3 35-46|| 7 | 522-6 || 8 | 711-2 30 9-98 
10 35-05|| 12 | 526-0 | 13 | 710-1 45 13-03) 47 | 533-3 | 48 
30 34-79] 32 | 538-6 | 33 | 710-5 50 13-3052 | 532-7 |53 
40 33-92 || 42 | 538-5 | 43 | 711-9 55 13-6257 | 533-7 ||58 
Mar. 22 4]| 0 32-28] 2| 542.9 3| 714-5 | Mar. 29 12] 0 13-84] 2 | 533-9 | 3 
5 14-65|| 7 | 536-8 | 8 
Mar. 29 6) 0| 25 27-38] 2) 544.4 3 | 725-3 10 15-19 | 12 537-1 | 13 
Mar. 29 7 || 15 19-24] 17 | 551-0 | 18] 809-1 15 15-52 18 
20 17-58 || 22 | 555-5 || 23] 835-3 20 15-9922 | 538-2 | 93 
25 14-62 || 27 | 551-4 | 28 | 856.6 eos 
30 12-40|| 32 | 544-2 | 33 | 844-3 | Apr. 5 2 03] 25 36-06] 23) 549-5 | 33 
35 11-15] 37 | 545-0 || 38 | 788-8 253 31-32 || 273) 524-0 || 284 
40 17-24|| 42 | 540-9 || 43] 785-8 303 31-64) 325) 526.2 || 333 
; 45 18-95 47 | 543-6 | 48 | 803-1 | Apr. 5 3 | 253 32-22 273) 550-8 | 283 
50 17-79 || 52 | 543-6 || 53 | 788-1 303 31-97 | 323.) 550-1 | 335 
55 22-35 || 57 | 537-4 | 58 | 777-5 453 37-10) 473| 542-8 || 483 
Mar. 29 8 || 0 19-42|| 2| 538-4 || 3] 747- 503 35-53 523) 549-1 | 533 
5 23-79] 7 | 522-3 | 8| 720-7 55% 33-99 | 573) 555-3 | 583 
10 23-68] 12 | 5181 | 13] 755-9 | Apr. 5 4] 03 34.55 | 23| 555-9 | 33 
15 15-49|| 17 | 532-9 | 18 | 746-9 53 36-13) 7h) 557-1 | 8} 
20 15-30|| 22 | 537-2 | 23 | 747-0 103 36-31) 123) 564-4 | 133 
25 15-46 || 27 | 535-9 || 28| 733-5 153 37-51) 173) 562-5 | 183 
30 16-30] 32 | 534-9 || 33 | 716-2 203 37-41 | 225) 577-7 | 233 
35 19-04 37 | 536-8 | 38 | 702-6 253 41-54) 273) 572-0 | 284 
40 20:05 || 42 | 538-1 | 43 | 691-4 303 42-26 | 323) 563-0 | 333 
45 21-82 47 | 529-0 | 48 | 696-8 352 38-60) 372) 583-3 | 354 
50 18-95 || 52 | 531-6 | 53 | 704-7 404|  42-60// 423) 580-1 | 434 
Mar. 29 9 0 17:14|| 2 534-1 3) 719.3 452 43-17 || 474| 585-8 || 484 
5 16-53] 7 | 531-4 | 8 | 722-7 503 44.50 | 523) 580-9 | 535 
10 13-21]| 12 | 533-9 | 13 | 724-1 55} 45-75 973) 579-4 | 583 
15 13-03|| 17 | 537-3 || 18 | 721-0 | Apr. 5 5 | 03 38-89 | 24) 604-4 | 33 
20 12-36 | 22 | 537-3 | 23 | 710-7 5 36-80 | 63) 628-6 
25 14.03 || 27 | 530-9 || 28 | 702-5 7y| 647: | 
30 14.83] 32 | 527-0 | 33 | 691-9 103 27-29 113) 662+ | 
35 14-06 || 37 | 529-2 || 38 | 687-9 123) 671- | ‘ 
45 13-34 || 47 | 522-8 | 48 | 670-3 : 
50 12-94 || 52 522-4 || 53 667-2 154 20-23) 174] 697- ? ) 183} 1202:0° 
: 
BIFILAR. k=0-0001248. BaLANncE. k=0:000015 approximately. 
Biritar THER 2, 2. HH Be fe 
BaLaNnce Phe eee \ BAREA AHS HE (areg3 PIERS { goa greece {are13 2a h {47008 IS, { $60 
294 12h, (ara 
March 294 and April 54. See notes on Aurora, p- 61. 
April 545, The readings of the Bifilar from 5% 5™ till 45™ were estimated, as the scale, though in view, was beyond the vertical wir 
of the telescope; at 174™ the scale was completely out of the field, and the reading given is a rough approximation. 
The half minutes in the times of observations before 6" 5™ are due to clock error. 
