54 ExTRA OBSERVATIONS OF MAGNETOMETERS, JuLY 2. 1842. 
DECLINATION. | BIFILAR. BALANCE. DECLINATION. BIFILAR. BALANCE. 
yOttingen ‘ 2 3 A P Gottingen . : * . e 
Mews Time. 5 Reading - BONE _ ene Mean Time. a ening a eS ae Beene 
Obs. Reduced. |! o5.| rected. || Obs.! rected. Obs. | “°SP®™ | Obs.| rected. || Obs.| rected. 
ey eal i i i i a m Se. Diy. ™ Mie. Diy. 
d || 4 ¢ m. Se. Div, m. Mie. Div. dad. h. mt . a . 5 a hs 
July 2 6 "6 | 13213 | 7 | 576-8 8; 983 | July 2 7 | 51) 122-47 || 52| 572-4 | 53 883 
‘ | 9} 133-53 | 10} 588-0 | iL 993 (574-1) | 
| (591-0) | | 54 | 122-73 || 55 | 575-7 | 56 865 
12 596-3 || 13 | 1000 57 | 125-55 || 58 | 573-5 || 59 863 
14 | 134.00 || 15 | 586-6 July 2 8] 0} 126-42 || 1) 572-6 2 862 
16 | 588-0 17 1011 6 | 130-12 8 | 560-7 1Ouee 874 
(589-5) 12 | 128-43 || 14 | 547-9 | 16 | 869 
18 | 130-32 || 19 | 588-0 || 20] 1012 18 | 129-30 || 20 | 545-6 | 22) 866 
21 | 588-2 24 | 129-37 || 26 | 541-9 || 28; 858 
22 | 587-1 || 23 | 1006 | 30 | 129-85 || 32 | 538-4 || 34 863 
| 24 | 129-17 || 25; 582-6 | 26 996 | 36 | 127-70 || 38 | 537-4 | 40! 860 
27 | 570-2 42 | 124-82 || 44 | 534.2 || 46 844 
28 | 568-5 29 1002 48 | 125-22 || 50 | 526-7 52 815 
(572-4) 54 | 128-90 || 56 | 504-9 | 58 | 751 
30 | 130-72 || 31 | 604-7 || 32] 1047 | July 2 9] O| 125-82) 1] 480-2 2! 704 
33 | 602-0 | 3} 125-08 | 4 | 473-0 5 689 
34 | 597-3 || 35 | 1044 6 | 122-93 | 7 | 473-0 8 684 
| 36 | 128-30 || 37 | 594.4 || 38} 1031 9 | 120-58 || 10 | 482-6 || 11, 684 
39 | 594.3 12 | 116-77 || 13 | 468-9 || 14 663 
40 | 592.0 41 1020 15 | 116-83 || 16 | 483-4 17 653 
42 | 127-97 || 43 | 584-2 || 44] 1002 (486-0) 
45 | 586-6 18 | 117-70 || 19 | 492-2 | 20 665 
46 | 585-3 || 47 987 21 | 116-70 || 22 | 501-1 || 23 671 
(587-6) 24 | 116-35 || 25 | 489-1 | 26 668 
48 | 123-20 || 49 | 593-6 || 50 983 | (484-1) 
51 | 117-10 || 52} 602-3 || 53 959 27 | 114-22 || 28 | 4760 | 29 637 
54 | 118-43 | 55 | 576-9 || 56 945 30 | 112-87 || 31 | 474.8 | 32 605 
(572-9) (473-2) 
57 | 115-48 || 58 | 571-6 59 945 33 | 114-35 || 34 | 466-3 || 35 581 
July 2 7] 0} 108-05 | 1) 592.4 2 925 36 | 113-73 || 37 | 476-0 | 38 569 
(595-8) 39 | 113-20 | 40 | 466-0 || 41 558 
3 | 110-38 || 4] 601-7 5 916 42 | 109-98 || 43 | 461-9 | 44 538 
| 6 | 114-35 || 7 | 602-7 8 922 (460-4) | 
(603.7) 45 | 108-16 | 46 | 447-1 | 47 510 
9 | 115-55 || 10 | 597-4 | 11 927 48 | 109-18 || 49 | 434-5 | 50 479 
(596-0) ; 51 52 | 419-4 | 53 458 
| 12 | 113-80 | 13 | 588-6 |) 14 932 54 | 110-65 || 55 | 406-3 || 56 431 
15 | 112-00 || 16 | 586-5 | 17 930 57 58 | 398-8 | 59 406 
| 18 | 109-12 || 19 | 604-2 | 20 g23 | July 210] o 1 | 387-4 2 367 
(607-0) 5 4} 104-90 || 4) 392.9 5 345 
| 21 | 111-05 || 22 | 613-7 | 23 912 6 | 106-70 || 7 | 386-5 
| 24 | 115-62 | 25 | 604-4 || 26; 906 8 | 108-43 8 332 
(602.4) | 10 | 110-92 || 10] 376-7 | 11 | 304 
| 27 | 119-18 || 28 | 592-8 || 29] 908 12 | 117-03 || 12 |Outoffield, 
| 30 | 120-72 || 31 | 594-8 | 32] 908 14 | 126-42 14 236 
| (593-8) 
33 | 122.27 || 34 | 585-1 || 35 904 32 | 130-32 | 
| 36 | 121-18 || 37 | 584-1 | 38 901 34 | 137-37 
| 39 | 122.93 || 40 | 579-5 || 41 | 896 36 | 139-38 
| (577-2) 38 | 141-05 39 | 214 
| 42 | 122.20 | 43 | 569.2 || 44 890 40 | 138-72 
(568-1) 42 | 134-95 
1 45 | 123-07 | 46 | 567-0 | 47 885 44 | 130-18 || 44 | 323-3 || 45 299 
48 | 125-55 || 49 | 561-3 || 50 889 46 | 126-48 || 47 | 358-4 
Rifilar Thermometer. July 24 74, 61°-6; 9%, 60:6. 
Balance Thermometer. July 2¢ 74, 61°-2; 94, 607. 
Ares of Vibration. Declination Magnet. July 24 10% 32m, 15’; 10% 34™, 7’; 10" 36™, 19’; 104 38m, 17’; 108 40™, 10’; 10% 42m, 26’, 
July 24105 10™. Bifilar Scale going out of field, reading estimated. 
July 221016™, ‘Torsion circle of Bifilar turned from 109° 10’ to 111° 35’. Various attempts were made to bring the scale into the 
field of the reading telescope, while the mirror for illuminating the collimator had been thrown out of position; this was not discovered till 
about 38™. The Balance crosses had also gone out of sight till the wooden front of the box was removed. In the adjustment of these two 
instruments the Declination readings were lost for some time. After 13 the torsion circle was turned to its original position 109° 10’. 
The observations of the Bifilar Magnetometer from 10% 38™ till 13 are reduced to the torsion circle reading 109° 10’. See Introduction. 
See note, page 51, on the observations in brackets. 
