68 Hovurty OBSERVATIONS OF MAGNETOMETERS, DECEMBER 25—31, 1845. 
Gottingen | | BIFILAR. BALANCE. ee Gottingen 1 Bririvar. BALANCE. Sq 
Mean Time || DECLINA- |/~ eo 2-5 | Mean Time | DecLiNna- |__| =a 
of Declina- || TION. Cor- |Thermo-) Cor- |Thermo-|| 2°E | of Declina- TION. Cor- |/Thermo-| Cor- Thermo-| $*2 
tion Obs. | rected. | meter. || rected. | meter. or tion Obs. rected. | meter. || rected. | meter. | om ‘ 
doh m | ie Se. Div. Ss Mie. Div. ba | iG.) tan ie Y 7 Se. Div. mS \|Mie Div. | | 
25 19 0 | 25 06-29] 546-8| 43-8 || 386-7| 44-1 || B } 29 4 0 || 25 05-77) 543-8) 36-8 || 428-1) 37-7 | H | 
20 0 06-93 || 547-6| 43-6 || 386-6| 43-9 || B 5 0 04-95 | 545-6) 37-3 | 424.5) 38-4 | H 
21 0| 07-64) 549-3] 43-4 || 386-0} 43-8 || H 6 0 04-68 | 547-3| 38-0 || 418-7] 39-1 | B_ 
22 0 || 07-94 || 545-6] 43-4 || 391-2] 44.0 | H 70 05-82 547-1) 38-6 | 414-7| 39-8 | W 
23 0 || 08-80 | 542-9| 43-4 || 394-3| 44.2 | H 8 0 05-74| 546-8 39-2 || 411-5] 40-3 | W) 
26 0 0] 09-69 | 540-8} 43-6 || 396-5] 44-5 | H 9 0 05-73 546-2) 39-7 || 409-4) 40-9 | W ] 
i (Ml 10-77 || 543-3| 43-8 || 399-2] 44-8 || H 10 0 05-51| 545-3| 40-3 || 409-7| 41-7 | W 
2 0 || 10-90 | 546-8| 44-1 || 402.3) 45-2 || H 11 0 05-13) 546-2| 40-9 | 408-4] 42.5 | H 
3 0] 10-77 || 548-2| 44-4 || 403-5] 45-6 || H 12°70 05-50) 547-4] 41-6 | 406-0| 43-3 | H | 
Eg ibe enced bisa eg Cal pects | 13 0 || 25 05-73| 547-0, 42.3 | 404.0| 440 | HY 
5 0] 09-10| 548-1} 44-9 || 399-4] 45-8 || H te | | 
| : f 14 0 05-74 | 548-5| 43-0 | 401-6] 44.7 | H fF 
6 0 ||  08.66|| 547-5| 45-0 || 396-6] 45-8 || W Sesh ety | 
| : a 1580, 06-26 | 548-2] 43-6 | 396-7| 45.2 || H 
60, 08-31 || 548-1] 45-0 || 394-9] 45-8 | W , | | 
| eee 16 0 06-18 | 550-2) 44.0 | 391-3] 45-6 || H 
8 O| 07-84 || 548-5] 45-0 || 391-4] 45.5 || W : 
| 17 0 13-68 || 546-2! 44.7 || 384-1] 46-1 || Hf 
9 0 07-76 || 548-9| 44-8 || 391-3] 45.2 || W : fed ae | 
HN | 18 0 06-52| 556-3) 45-0 | 363-5| 46-5 | H 
10 0 | 07-24| 546-8| 44.6 || 382-0] 44-9 || W igen z 
19 0 07:51 || 556-4) 45-5 | 361-0] 46-8 | W ] 
11 0] 06-90 544-6/ 44:3 | 394-5) 44.7 | H 20 0 07-35 | 540-0/ 45-9 || 365.4] 47-2 || w I 
256) 06-36] 544-5| 43-9 || 395-5] 44.2 | H ee 3 j ; : 
12 | 21 0 08-41) 544-7) 46-3 | 371-0) 47-5 | B 
13. 0 || 25 07-20] 544-5] 43-6 || 393-5] 43-8 || H 22 0 06-86 || 541-6] 46-5 | 371-5| 47-5 || W 
14 0 07-15| 544-4] 43-3 || 394-3] 43.4 || H 23 0 09-31 | 539-6) 46.6 | 378-8) 47-5 | W 
15 0} 07-04] 545-3] 43-0 || 392.4] 43-1 | H | 30 0 0 10-:77| 533-9| 46-6 || 382-8] 47-6 | W 
16 0 | 07-35| 544-8| 42.7 || 392-3] 42.7 || H i, 15) 10:89 || 530-0| 46-7 || 395-3] 47-6 || W | 
17 0] 07-34|| 548-5). 42-4 || 389-4] 42.3 || H BH) 15:56| 533-3| 46-8 | 407-1] 47-7 || Wf 
18 0] 07-98| 546-0| 42.2 | 391-5] 42.0 || H 3 0 01-84] 542-7| 46-9 | 441-7] 47-8 | WH 
19 0 07-76| 545-2| 41-9 || 393-4] 41-7 || W 4 0 16:82| 540.4| 47-0 | 430-1] 47-9 || Wf 
20 0 07-10) 545-4) 41-6 | 394-0) 41.4 | W 5 0] 06-00] 539-8| 47-1 | 428-6] 48-0 | H | 
21 0] 08-58 | 546-0) 41-3 || 394.6] 41.0 | B 6 0 04-60 | 534-7} 47-2 || 430-8] 47-8 | H } 
22 0 08-08 | 542-4] 41-0 | 396-9] 40-8 || W 70 07-29 | 534-5| 46-9 || 438-9| 47.4 | H | 
23 0 09-00) 543-1} 40-8 || 395-0} 40-6 || W Ss ko 07-07 | 532-0| 46-6 || 425-7) 47-0 || H_ 
27 0 0 10-50} 542-4] 40-6 |) 398-9] 40-5 || W 9 0 || 25 08-08 | 537-3) 46-3 || 398-2) 46-5 | H | 
1 40 11-84 || 542-5] 40-4 | 402.4) 40-5 | W 10 0 | 24 59-83) 540-0| 45.9 | 396-5) 46.0 | H | 
2 0 11-74|| 540-8| 40-3 || 403-9] 40-5 || W 11 0 || 25 08-55| 534-6] 45-5 || 389-3) 45.4 || B f 
55503) 11-24 || 532-1] 40-3 || 412.0) 40-5 | W 12 0 06-12) 535-1| 45-0 | 385-5) 44-8 | B_ 
4 0} 10:00} 537-4) 40-2 | 492.0) 406 | W) 13 0 || 25 05-56| 533-7] 44.5 | 382-7| 441 | Bim 
5 0 11-12|| 541-6] 40-1 |) 413-1] 40-5 || W : 
lees : 14 0 09-12] 538-1] 43-9 || 381-6] 43.4 || BY 
6 0 09-02 | 546-0} 40-0 | 412-5] 40-6 || H E j 
> ; 15 0 09-24] 537-3| 43-3 || 382.2] 42.8 | B | 
7 “0 08-99 | 542-9| 40-0 || 413-5] 40.7 || H ‘ | 1 
: e : 16 0 || 10-90 | 538-1| 42-8 || 386-6] 42-2 || B | 
8: 0 07-84] 542-8) 40-0 || 412-7] 40.8 | H ye | 
fi 17 0 09-24 || 537-9| 42-3 | 391-3] 41-8 || B” 
9 0 07-42 || 542-5] 40-1 || 413-6] 41-0 | H y 
| 18 0 10-40} 539-2] 41-9 || 393-8] 41-5 || B 
10 0 |] 05-45 || 542-4| 40-3 |) 413-8] 41-3 || H \ 6 ; 
: 19 0 12-51 || 540-4] 41-6 || 392-1] 41-3 || H 
11 0 06-63 | 545-1| 40-7 || 413-1] 41-7 || B : 
iat Fo 06-93 | 47-1| 41.2 | 409.7| 49.3 | B 20 0 10-33 || 544-3] 41-3 | 394-6| 41-1 || H 
a g f PN) 12:02 | 541-3] 41-0 || 396-4| 40-8 | W 
28 13. 0 || 25 07-40] 540-7| 38-1 || 407-3] 37-4 || W 22 0 11-62) 537-5] 40-7 || 396-2| 40-7 | 
14 0 |} 07-51] 540-5) 37-7 || 409-4) 37-1 |) W 23 0 12-89) 535-2] 40-7 || 399.3] 40-7 | H | 
15 0 || 07-60 || 541-7| 37-4 || 409-9] 36-7 || W] 31 0 0 | 12:08 || 534-7] 40-5 || 405-2] 40-7 || HY 
16 0 || 08-18 | 542-7| 37-0 || 410-1] 36-4 | W 0) 12-16 || 535-0] 40-5 | 409.2| 40-7 | H 
oe MO | 07-34| 543-4] 36-7 | 407-3] 36-0 || W 2 0 10:72] 535-4| 40-6 | 418-8] 40-9 | H™ 
is 0] 07-22) 544-1] 36-4 || 406-8] 35-7 || W 3 0 10:70|| 544-0| 40-7 || 423-2) 41-2 | H 
19 0} 07-07 || 544-3] 36-1 |} 409-7) 35-5 || B 4 0 10-09) 541-3| 40-8 || 425-7| 41-5 || H 
20 0 07-11] 543-6] 35-8 || 410-0] 35-3 || B 5 0 09-49 || 543-4] 40-9 || 424.3] 41-6 || H J 
21 0 06-83 || 542-9) 35-6 || 410-6| 35-3 | H 6 0] 08-99 | 543-9| 41-0 | 420-0] 41-7 | B 
22 0 06-98 | 542-8| 35-4 || 406-0] 35.2 || H 7) 10 08-99! 542-6] 41-0 || 417-0] 41-7 | By 
23 0 | 07-87 || 541-8| 35-4 || 404.1] 35.3 || H 8 Oo] 07-72) 541-5] 41-1 | 416-9] 41-7 || BY] 
29 0 0 08-75| 541-3) 35-4 || 410.9] 35-5 | H 9 0 00-53) 536-9| 41-1 | 418-6] 41-8 | Bf 
10: | 06-42) 542-8) 35-5 || 415.4| 36.0 | H 10 0 | 07-31] 541-0| 41-2 | 416-7] 42.0 | B | 
2 0] 07-05 || 535-1| 35-8 || 419-4] 36-5 | H ik, ell 12-35 || 537-8| 41-4 || 413-2] 42-1 |) W] 
3 0] 06-27 || 542-9] 36-3 || 425-9] 37-1 || H 12 Ol 06-04 | 538-4! 41-5 || 410-4] 42-3 || W 
DECLINATION. Torsion removed,—Dec. 294 0}, 0°; 294 1944, —11°; 304 9b, +7}°*; 314 Ob, 0°, +12°%, Effect of + 10° of 
torsion = — 084, 
Birivar. Observed 2™ after the Declination, k—0-000140. Batance. Observed 3™ after the Declination, s=0-000010. 
Dec. 294 1b—304 7h. Magnet with short scale used in the declinometer. The declination at 29d 51—Gh, and 30d Sh—9h, has been deduced from obser 
tions of the unifilar. 
* Dec. 304 8b. The deflecting magnet vibrated in the declinometer box. 
Dec. 304 10h—11h, The declination magnet seems to have a tendency to vibrate through large arcs even after the arc has been made very small by checking. 
Re 0h, Suspension thread wound up about; of an inch; torsion again removed. The declination at 31d 0h deduced from an observation of the 
unifilar. 
