j . Daity OBSERVATIONS OF MAGNETOMETERS, AUGUST 2—16. 1843. 17 
- Gottingen BIFILAR. BALANCE, Gottingen BIFILAR. BALANCE. 
_ Mean Time of DECLINA- Mean Time of DEcLINA- 
- Declination TION. Cor- |Thermo-|| Cor- |Thermo-+ Declination TION, Cor- |Thermo-) Cor- /Thermo 
~ Observation. rected. | meter. || rected. | meter. Observation. rected. | meter. || rected. | meter. 
. ——— |———_____ 
_ a h m. ° U Se, Div. e Mic. Diy. e m. 5 zy Se. Div. S Mic. Div. 2 
Aug. 218 0|| 25 19-80 || 502-9 | 58-0 || 638-0 | 58-0 Aug. 9 18 0) 25 18-63 | 499.6 | 59-5 31-7 | 59-5 
20 0 17-41 ||497-5 | 58-0 || 644-7 | 58-0 20 20 18-68 || 488-4 | 58-7 || 646.2 | 58-8 
; 22 0 20-97 ||493-1 | 59-7 | 635-7 | 59-0 22 0 20-10 || 479.4 | 59-0 || 645-3 | 59-2 
Aug. 3 0 O 26-89 ||488-6 | 61-4 ||619-6 | 60-7 | Aug.10 0 0 28-27 || 490-7 | 61-6 || 607-0 | 61-0 
2 0 29-29 || 507-1 | 64-0 || 610-1 | 63-0 2 0 28-64 | 507-4 | 65-3 || 624-4 | 64-1 
4 0 29-08 | 535-3 | 66-7 | 604-0 | 65-2 40 25-02 | 512.0 | 67-8 || 637-6 | 66-0 
6 0 21-08 || 512-7 | 68-0 || 637-0 | 66-5 6 0 22-53 || 522.7 | 69-2 | 641-3 | 67-2 
8 0 21-79 | 526-7 | 67-3 | 617-9 | 66-0 8 0 21-58 || 509-7 | 69-0 || 628.6 | 67-0 
10 0 16-67 | 527-2 | 65-2 || 625-7 | 64-7 10 0 22-74 | 508-5 | 67-0 || 621-3 | 65-8 
18 0O|| 25 17-78 || 497-4 | 59-4 || 602-5 | 59-5 18 0] 25 18-55 | 501-7 | 59-0 || 636-1 | 59-3 
20 0 20-27 |\497-1 | 59-0 || 621-0 | 59-2 20 0 17-67 || 490-8 | 58-8 || 641-1 | 58-8 
‘ 22 0 20-82 | 466-7 60-4 | 625-5 | 60-2 22 0 22-60 | 483-3 | 59-6 || 637-6 | 59-5 
Aug. 4 0 O 31-43 |/490-3 | 62-8 ||601-8 | 62-2 | Aug.11 0 0 27-50 | 485-6 | 62-1 || 626-2 | 61-5 
, 2 0 29-42 ||512-9 | 65-0 || 682-0 | 64-0 2 0 30-63 || 501-5 | 64-7 || 626-3 | 63-5 
4 0 32:78 || 519-3 | 66-0 || 685-9 | 65-0 4 0 24-18 || 499.6 | 65-7 || 661-8 | 64-6 
6 0 13-68 || 537-3 | 67-0 | 772-5 | 66-5 6 0 22-57 | 513-5 | 66-6 || 653-3 | 65-5 
8 0 21-24 || 517-4 | 66-2 | 679-1 | 65.4 8 0 19-87 || 512-7 | 66-3 || 648-0 | 65-5 
' 10 0 20-61 ||511-5 | 64-9 || 624-7 | 64.4 10 0 20:62 || 524.8 | 65-1 || 617-5 | 64-7 
18 0O|| 25 18-82 || 492-3 | 58-8 ||643-9 | 59-0 18 0|| 25 20-17 | 497-8 | 59-4 || 630-0 | 59-7 
’ 20 O 19-22 || 484-0 | 58-4 || 643-3 | 58-7 20 0 20-43 || 497.3 | 59-1 || 636.9 | 59-5 
| 22 0 23-06 || 487-3 | 59-2 || 630-4 | 59-2 22 0 23-30 | 487-0 | 60-0 | 634-8 | 60-0 
um. 5 0 O 24-71 |/499-7 | 61-3 ||623-7 | 60-9 | Aug.12 0 0 27-60 | 485-7 | 62-9 || 623-4 | 62-3 
2° 0 25-98 || 503-1 | 63-1 || 646-0 | 62-4 2 0 33-00 || 515-5 | 67-0 || 621-0 | 65-6 
i 4 0 23-24 || 509-5 | 64-4 || 628-8 | 63-5 4 0 23-32 | 512-2 | 70-0 || 634-2 | 68-3 
6 0 23-39 516-4 | 64-2 || 615-9 | 63-5 6 0 20-47 || 514-4 | 71-9 | 628-2 | 70-0 
8 0 19-40 | 516-0 | 63-2 || 647-9 | 63-0 t= eel) 17-49 | 507-7 | 69-7 || 635-5 | 68-5 
i 10 O 22-50 || 506-3 | 61-9 || 633-1 | 61-8 10 0 20-62 | 507-5 | 69-1 || 628-9 | 68-3 
| 
ug. 6 18 O|] 25 20-37 || 499-4 | 56-9 ||612-5 | 57-1 | Aug.13 18 0] 25 18-37 ||494-0 | 61-7 | 632-8 | 62-3 
| 20 0 18-65 | 494-4 | 56-6 ||615-9 | 56-7 20 0 17-62 || 489-0 | 61-0 || 641-7 | 61-4 
22 0 21-61 | 490-6 | 57-5 || 620-7 | 57-4 22 0 19-87 ||486-0 | 61-7 || 652-7 | 61-9 
ig. 7 0 0 23-90 ||497-3 | 59-0 || 606-4 | 58.5 | Aug. 14 0 0 27-54 ||485-7 | 64-1 || 630-6 | 63-6 
2 0 26-80 | 501-9 | 60-6 ||610-1 | 59-7 2 0 30-65 || 508-4 | 68-0 || 642-3 | 66-5 
| 4 0 24-38 | 507-2 | 61-0 || 619-6 | 60-2 4 0 28-00 || 508-8 | 70-4 || 648-2 | 67-6 
WV 6 0 23-66 | 514-9 | 61-0 || 630-4 | 60-4 6 0 25-78 || 509-2 | 69-4 || 657-7 | 67-4 
| 8 0 17-34 | 519-7 | 61-0 || 636-0 | 60-5 8 0 23-21 || 514-7 | 68-0 | 663-8 | 67-2 
| 10 0 22-67 ||510-3 | 61-2 || 622-0 | 60-6 10 0 20-60 || 503-4 | 66-2 || 618-6 | 65-7 
. 18 0|| 25 17-98 || 497-9 | 60-S ||576-1 | 60-5 18 0O]| 25 20-41 || 498-1 | 60-0 || 652-0 | 60-3 
} 20 0 17-17 || 494-8 | 60-7 || 609-9 | 60-5 20 0 19-24 | 493-8 | 60-0 || 651-7 | 60-0 
22 0 21-05 || 486-2 | 61-3 || 609-7 | 61-0 22 0 23-93 ||489-5 | 60-7 || 638-9 | 60-6 
ig. 8 0 7 26-06 |\489-1 | 62-5 590-0 | 61-9 | Aug.15 0 0 29.26 ||490-0 | 61-2 | 627-3 | 61-0 
F 2 0 30-12 || 497-3 | 63-4 || 604-3 | 63-5 2 0 30-22 ||499-4 | 62-4 | 641-7 | 62-0 
4 0 26-72 | 511-8 | 65-7 || 624-5 | 64-6 4 0 26-64 || 505-2 | 64-0 || 654-4 | 63-2 
} 6 0 22-43 || 503-7 | 66-4 || 647-4 | 65-5 6 0 23-79 || 508-5 | 64-6 || 655-8 | 63-7 
8 0 16-65 || 512-1 | 65-9 || 665-8 | 65-1 8 0 22.63 | 507-5 | 64-3 || 643-0 | 63-5 
= 10 0 19-47 || 507-1 | 64-0 || 622-1 | 63-9 10 O 22.09 || 512-1 | 63-6 | 635-1 | 63-1 
} 0|| 25 37-51 || 461-8 | 60-6 || 475-2 | 60-7 18 0} 25 19-34 || 502-4 | 61-6 || 640-9 | 61-5 
0 19:49 || 498-1 | 60-4 || 537-5 | 60-5 20 0 20-65 || 495-7 | 61-3 | 645-5 | 61-3 
0 21-95 || 478-8 | 61-0 || 605-6 | 61-0 22 0 22-92 ||492-4 | 61-7 || 641-6 | 61-5 
0 25-88 ||492-8 | 63-3 ||585-2 | 62-8 | Aug.16 0 0 26-96 | 492-0 | 63-0 | 631-8 | 62-5 
0 31-04 || 496-6 | 66-4 | 613-8 | 65-4 2 0 27-53 || 504-6 | 65-2 | 632-2 | 64-2 
0 26-08 | 515-4 | 69-6 ||619-5 | 67-8 4 0 26-43 | 511-2 | 68-9 || 633-4 | 67-1 
0 21-01 || 508-6 | 70-2 || 641-8 | 69-5 6 0 21-48 ||510-0 | 71-0 || 643-0 | 68-0 
0 20-61 || 496-4 | 68-0 || 644-8 | 66-5 8 0 22-63 ||511-8 | 71-1 || 634-2 | 69-0 
0 23-88 || 506-3 | 67-0 || 628-3 | 66-0 10 0 22-79 | 510-3 | 69-0 || 629-7 | 67-9 
DECLINATION. Torsion removed, circle reading,—Aug. 44 7%, 67°; 54 3h, 63°; 104 23h, 69°; 134 23», 81°.* 
Birizar. k=0-0001205. BALANce. k=0-000015 approximately. 
ug. 74 2h. Walue of the torsion co-efficient determined for the Declinometer suspension thread. 
114 0h—134 22h, Magnet with short scale placed in the Declinometer, on account of observations for absolute horizontal eres 5 
Introduction. 
g- 124 3h, Declination magnet removed, and the deflection magnet substituted, in order to determine its time of vibration. 
MAG. AND MET. oBs. 1843. 
