ExtTRA OBSERVATIONS OF MAGNETOMETERS, DECEMBER 3, 1845. 115 
BIFILAR BALANCE BIFILAR BALANCE : 4 BIFILAR BALANCE 
orrected. Corrected. DECLINATION. Corrected. Corrected. DECLINATION. Corrected. Corrected. 
is i in.| Se. Div. in. | Mic. Diy. . . in. in, | Se. Div. || Min. | Mic. Div. 
25 12-11 559-5 829-5 551-4 833-5 
12-16 570-9 835.4 : 0 | 531-8 828-7 
07-71 580-1 845-7 520-2 818-2 
02-42 604-4 859-4 516-9 808-8 
02-52 620-0 861-5 3 | 513-1 800-5 
05-22 627-3 857-3 31- 509-4 786-7 
10-27 629-0 842-1 554-1 783-2 
16-48 628-9 822-9 608-1 792-2 
639-8 811-0 615-3 793-2 
606-6 804-0 B 597-4 785-5 
791-6 595-7 785:3 
3) 657-1 789-1 615-1 793-2 
615-2 768-6 é 619-8 778-3 
5 633-1 750-1 
720-5 : 3 | 652-3 
669-6 624-6 
602-3 
706-8 ) 602-1 
834-0 B 623-8 
882-8 650-6 
885-8 é : 628-3 
881-5 607-4 
854-2 9. 573-4 
828-0 ‘ 536-5 
817-2 3 | 528-4 
843-3 521-4 
858-6 503-4 
855-4 } 
834-2 
796-5 
771-4 
769-2 
410-6 774-1 
420-9 781-3 
436-2 795-2 
462-3 797-3 
499-2 796-7 
524-9 795-3 
543-8 797-0 
561-7 798-2 
571-0 800-6 
586-7 
597-1 808-8 
613-2 790-2 
621-0 814-1 
623-2 816-5 04-14 
625-0 4 | 816-5 04-44 
625-0 i 
649-5 817-8 02.59 
of field) 810-9 
798-2 04:64 
647-0 792-0 06-16 
645-7 797-7 10-47 
631-5 802-9 09-26 
611-9 815-5 05-69 
599-7 827-7 ! 56-74 
587-5 839-9 56-74 
588-7 844-1 } | 59-32 
576-5 837-1 | 3: 57-98 | 
: 569-7 01-21 
18 6 564-0 836-7 13-05 |) 
BIFILAR. k=0-000140, BALANce. k=0-000010. 
* See notes on the Aurora Borealis, after the Extra Observations of Magnetometers. 
lec, 34 7h 30m, he bifilar magnet moving backwards and forwards with great rapidity. 
Dec. 3474 48m. Arms of the bifilar torsion circle turned back from 107° 3’ to 110° 23’-0, The observations of the bifilar from 74 48™ till 
‘47 have been corrected (by — 5°5 sc. div.) to the original reading of the torsion circle. See Introduction, p. xxxii. 
. 318h 37m, The declination magnet moved westwards from 36™ to 37™. 
