10 DAILY OBSERVATIONS OF MAGNETOMETERS, APRIL 26—May 10. 1843. 
Gottingen Brriuar. BALANCE. Géttingen BIFizar. 
Mean Time of DECLINA- Mean Time of DeEcLiNna-_ || ——_——_—_ ~ 
Declination TION. Cor- |fhermo-|| Cor- |Thermo: Declination TION. Cor- |Thermo-|| Cor- 
Observation. rected. | meter. || rected. | meter. Observation. rected. | meter. || rected. 
= ¢ | Se. Div. Mie. Div. a dad. h. 
25 19-67 -9 675-2 | 42-6 | May 3 18 
17-99 | 533- -5 677-1 | 42.3 20 
22-13 a : 673-4 | 43-0 22 
30-12 : ‘0 || 646-1 | 45-5 | May 4 
30-07 || 538- *8 || 646-0 
25-92 671-1 
22-79 || 688-3 
22-58 . ‘5 | 683-6 
23-26 || : -0 | 676-8 
17.83 | 541- ‘8 | 675-5 
18-95 ; -2 || 672-0 
22.85 E 2 || 665-5 
27-43 . 9 | 661-1 
29.85 : 8 || 664-4 
25-86 : 3 | 672-7 
22.58 | 507: 0 | 682-2 
29.18 | 504. 1 | 684-4 
21-21 3 671-1 
19-76 . ‘8 || 680-7 
18-21 \ 2-6 | 672-5 
21-48 : -8 | 661-1 
20-70 : 8 || 653-4 
29-95 . -2 || 654-8 
27-20 || 
24-17 
23-27 
22-74 
19-65 
18-82 
22-06 | 
28:27 || 
29-36 
25:38 
23-46 || 
22-42 
Se. Div. = Mie. Div. 
499-4| 50-3 || 673-6 
497-5| 49-9 || 667-1 
491-5| 50-9 || 668-3 
493-1 . 644-3 
509-8 639-1 
502-6 D 651-8 
511-6 : 664-6 
511-6 9- 676-7 
507-7 cl 665-2 
496-7 cl 669-7 
493-3 : 666-9 
485-6 . 671-3 
490-0 : 651-5 
500-0 . 658-2 
505-8 , 669-0 
516-2 : 672-2 
512-6 . 673-7 
508-6 . 663-1 
496-5 : 676-8 
494-6 : 679-1 
493-1 : 657-8 
497-7 : 645-0 
508-6 : 640-8 
517-8 . 641-1 
516-6 ‘9 || 660-2 
518-0 . 701-7 
422.7 . 400-2 
464-3 : 636-1 
478-9 : 665-3 
461-6 : 692-9 
481-8 : 693-0 
484-6 685-5 
489-5 : 692-0 
498-5 684.0 
509-9 . 678-4 
499-2 . 674-6 
a, h. 
Apr. 26 18 
20 
22 
Apr. 27 
481-7 604-4 
645-7 
673-7 
660-8 
657-1 
688-6 
695-0 
716-6 
627-0 
654-9 
643-0 
659-0 
660-7 
664-3 
696-9 
705-6 | 
708-6 
680-4 
m. 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
DECLINATION. Torsion removed, circle reading,—May 14 23%, 36°; 64 5, 150°t ; 104 3%, 155°. 
Birinar. k=0-0001205.* BaLance. k=0-:000015 approximately. 
* April 274 2h—6h. Bifilar magnet adjusted. 
* April 284 0h—2h,_ Bitilar magnet again adjusted. 
May 24. Several observations of the Deglination not made for the same reason as on April 184, ot - 
t May 64 4b. Observations made for the zero of the Declination scale when a fibre of the suspension-thread was broken. The torsion was ultimately eliminated 
: _ 7 ae Seo excessive magnetic disturbance, during which the torsion circle of the Bifilar Magnetometer was turned from 287° 44 to 291° 45’; it 
eft reading 287 ° 
May 94. The Bifilar magnet has been moving irregularly throughout the day; the reading has often been as high as 512 Se. Diy. 
