68 ExtTRA OBSERVATIONS OF MAGNETOMETERS, AuGUsT 8—SrpremBer 18. 1843. 
| DECLINATION. BIFILAR. BALANCE. DECLINATION, BIFILAR. BALANCE, 
ee eae Min. Reading Min. Reading Min.| Reading oa Min. Reading Min.| Reading | Min. 
ona maaeed: of Cor- of Cor- On aedweadt of Cor- of 
|| Obs. Obs. | rected. || Obs.| rected. Obs. Obs. | rected. || Obs. 
dad. oh. m. S é m. Se: Div. ™. Mic. Div. 1 m. ? Y, m. Se. Div. m. 
Aug. 8 18 | 40 | 25 42-23 || 42 503-7 || 43 427-6 Sept. i 2 3/25 31-22) 5 507-7 eae 
45 39-20 || 46 508-6 24 31-00 || 22 517-9 tes 
47 508-6 || 48 421-5 25 500-0 ee 
50 37-77 || 52 511-3 53 426-7 46 32-42 || 44 518-6 
55 35-62 || 57 513-1 58 429-9 | Sept. 1 3 | 10 33-62) 11 511-9 
Aug. 8 19 0 33-71 2 512-5 3 436-1 35 28-97 || 33 493-6 ooo 
5 32-95 7 512-8 8 445-5 35 490-9 see 
20 32-15 |) 22 512-7 23 457-2 37 496-6 tes 
25 30-10 || 27 504-6 28 482-9 56 521-2 vee 
45 23-06 || 47 502-2 || 48 512-0 58 28-30 | 59 529-1 tees 
Aug. 8 20 0 19-49 2 498-1 3 537-5 | Sept. 1 4 0 27-78 2 525-1 vee 
Aug. 8 21 || 20 20-20 || 22 486-3 23 595-8 16 525-9 tee 
25 20-21 |) 27 483-5 28 596-7 18 27-10 || 19 513-8 a 
Aug. 8 22 0 21-95 2 478-8 3 605-6 39 502-9 oe 
40 29-35 || 42 516-7 tee 
Aug. 22 0 0 | 25 31-76 2 498-8 3 663-3 4 530-1 tee 
Aug. 22 1 5 39-39 a 490-0 Sept. 1 6 7 29-20] 8 532-4 
10 37-03 |) 12 477-7 13 675-3 27 506-3 
15 36-38 | 17 483-6 18 673-0 30 23-01 || 29 513-2 
20 38-11) 22 492.1 23 671-7 47 514.2 
25 39-59 || 27 505-4 28 665-5 50 20-12) 50 497-8 
30 40-89 || 32 509-6 33 664-7 | Sept. 1 6 0 19-42 2 491-8 
35 36-63 | 37 481-4 38 675-3 8 495-9 
40 35-67 || 42 497-8 43 665-1 9 17-12] 11 503-8 
45 37-07 || 47 496-9 || 48 Pr 46 23-05 
50 36-60 | 52 494-9 53 668-8 | Sept. 1 8 0 17-60|| 2 511-8 
55 34-65 || 57 490-3 58 672-9 
Amp 22) 12 0 33-54 2 487-4 3 675-0 | Sept. 1 20 0 | 25 32-55 2 478-0 oe 
20 33-98 || 22 530-0 23 Bh 15 31-72 || 17 489-6 aa 
25 33-84 || 27 529-8 28 683-7 30 30-37 || 32 496-4 ave 
30 32-48 || 32 516-8 33 689-2 45 28-17 || 47 503-1 
35 31-46 || 37 517-2 || 38 692-1 | Sept. 1 22 0 24-41 2 483-5 
42 526-3 Sept. 2 0 0 26:83 2 485-6 
45 32-87 || 47 552-3 48 Be 57 28-44 |) 56 492-8 
50 33-78 || 52 536-6 53 ge Sept. 2) as 28-35 || 18 497-6 
57 524-3 38 505-6 
Aug. 22 3 2 521:3 55 489-7 
5 33-17 i 524-1 8 705-2 | Sept. 2 2 0 28-05 2 492.4 ote 
17 514-6 11 500-0 ooo 
40 33-51 || 42 533-1 43 708-3 14 510-1 “ 
45 31-50 || 47 512-0 || 48 715-6 28 507-0 
50 31-07 | 52 505-0 53 720-4 31 497-6 
57 495-2 48 505-1 
Aug. 22 4 0 31-22) 2 504-7 3 718-9 | Sept. 2 3] 10 27-37 || 11 498-1 
10 30-42 | 12 505-1 13 716-6 29 493-1 
Aug. 22 5 || 15 28-64 || 17 533-9 18 613-2 | Sept. 2 4 0 26-60 2 503-8 
| 35 27-33 || 37 523-6 38 628-5 | 21 517-6 
Aug. 22 6 0 26-94 2 519-0 3 731-3 | Sept. 2 5 | 19 22-42) 20 499-2 
= i 38 513-1 
Sept. 1 0 0 | 25 28-59 2 504-7 oe Sept. 2 6 0 20-36 2 507-5 
| 59 29-95 || 58 499-8 oe oo | 
Sept. 1 1] 0 2 499-8 see | wees Sept. 18 10 0 | 25 7-65)) 2 519-0 3 
| 21 30-73 || 22 505-5 Soe 10 5-65 || 12 530-1 13 
| 43 31-22] 42 | 513-5 |... | ose 15, 4.28) 17 | 539-5 || 18 
Sept. 1 2] 0 31289) 2) | Sil4e3y ive |) 2202 20 5-33 || 22 | 539-7 || 23 
Birivar. k=0-0001205, BaLance, k=0:000015 approximately, 
BiriLan THERMOMETER. 604 58°7 
BALANCE Demeueueney er ae { Gors: eas { 58-2" 
Aug. 224. A faint Aurora observed for a short period this evening at Edinburgh. 
Sept. 1424, Observations made during experiments to determine the temperature correction of the Balance Magnet. 
