DAILy OBSERVATIONS OF MAGNETOMETERS, JANUARY 17—FEBRUARY 12. 1842. i 
Gottingen BIFIvar. BALANCE. Gottingen BIFILAR. BALANCE, 
Meah 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, 
h bh m. 4 Se. Div. 3 Mic. Div| ° CU laa ‘ Se, Div. a Mic. Div} . ° 
Jan. 17 20 0|| 128-34 || 523-0] 37-3 || 939-9] 38-8 | Jan. 31 20 O|| 128-72 || 525-4] 43-7 || 906-4) 44-3 
23 O|| 127-03 || 515-9} 39-8 || 959-3] 41-7 23 0} 125-79 || 520-2] 44-5 |) 920-8] 45-0 
Jan. 18 2 O|| 128-14 || 516-3] 43-9 || 946-9| 44-5 | Feb. 1 2 O|) 129-70 |) 520-2) 53-6 |).896-7| 53-8 
5 0|| 127-60 || 510-0) 46-2 || 993-7) 46-6 5 O|| 125-97 || 535-5} 52-1 || 982-6] 52-3 
20 O|| 127-58 || 513-4) 39-2 || 947-1] 39-8 20 O|| 123-40 || 520-6] 49-9 || 908-7| 50-6 
23 O}] 129-30 || 512-7} 43-2 || 967-4] 43-2 23 O}] 127-25 || 509-0} 50-6 || 910-8) 51-1 
Jan. 19 2 O]] creer 527-4| 52-7 || 946-6| 52:6] Feb. 2 2 O|| 130-82 || 528-2] 54-6 || 930-7) 54-9 
5 O]] weeeeeeee 526-0| 52-1 || 948-0] 52-2 5 O|| 130-40 || 515-1} 56-1 || 923-5] 56-7 
20 OO] wrereeees 522-3| 57-8 || 940-7] 59-4 20 O}] 123-95 || 510-0] 42-4 || 921-9) 42-5 
23 O]] veers 511-9| 53-5 || 955-6} 55-3 23 Ol 126-90 || 513-9] 42-7 || 938-9] 43-8 
Jan. 20 2 O}f eee 524.9) 58-8 || 947-4] 60-9] Feb. 3 2 O]) 131-43 || 521-1] 49-2 || 929-5) 49-1 
5 OO] weereeees 525-5| 59-6 || 955-5] 61-2 5 O|| 125-42 || 526-7] 53-9 |) 905-1] 53-2 
Jan. 21 20 O]f «.-eeee 517-6 | 46-9 || 973-8] 49-8 20 O|| 124-43 || 520-1| 48-5 || 946-0] 49-4 
23 O]] cereeeeee 504-4] 44-3 || 971-2| 45-4 23 O}] 125-97 || 517-2| 48-6 || 919-7] 49-6 
Jan. 22 2 Off cerrreeee 517-2| 46-6 || 967-7| 49:0] Feb. 4 2 O|| 132-67 || 524-2) 51-6 || 914-5] 52-0 
5 OO] weeeeeeee 522-4] 48-8 || 963-9| 51-1 5 O|| 130-83 || 526-9] 53-4 || 911-9] 54-1 
Sistas 23 AD) |O |)! ssvencaca lif vaecnat fina Desai) sapieas||P eretncs 20 O|| 125-35 || 518-6] 47-1 || 920-7] 48-1 
23 O}] «eee+e+es |] 508-8] 33-9 || 978-2] 34-5 23 O|| 127-03 || 512-2} 46-3 || 945-9] 47-9 
Jan. 24 2 0 525-4| 44.2 || 940-4| 44:1] Feb. 5 2 O|] 131-85 |} 518-2] 50-9 || 913-9) 51-1 
5 48-3 || 958-9] 48-1 5 O}| 128-43 || 523-0) 51-6 |) 912-0) 52-1 
20 38-5 || 941-1| 39-8 | Feb. 6 20 0|] 130-90 || 504-7} 31-9 || 906-6) 32-1 
23 41-6 || 983-5] 41-4 23 0|| 128-52 || 505-9} 34-8 || 945-9] 35-3 
Jan. 25 2 49-9 || 940-1] 50-1] Feb. 7 2 O|| 139-60 || 507-8] 42-7 || 939-3) 42-5 
5 51-0 || 948-8] 50-8 5 O} 135-42 || 530-9] 49.0 || 931-4) 48-2 
20 42-7 || 948-7] 44.3 20 O|| 126-62 |) 515-3} 43-9 || 921-6) 45-1 
23 44-6 || 970-4| 44-6 23 O|} 132-45 || 514-6] 45-6 || 925-3) 45.8 
Jan. 26 2 43-8 || 967-4] 45-4] Feb. 8 2 O]] 134-08 || 520-4] 49.4 || 907-8] 49-1 
5 45-6 || 957-1| 47-1 5 O|| 132-45 |) 525-0] 53-8 || 900-8} 53-6 
20 O}] ceeeeeeee 518-1] 41-7 || 964-5] 42-5 20 O|| 132-00 || 519-1] 46-6 || 920-9] 48-1 
23 O]] eeseeeeee 515-4| 433 || 970-5) 44-1 23 0|] 130-93 || 512-0] 45-1 || 922-9) 46-5 
Jan. 27 2 Off -----seee 525-9] 48-4 || 935-0] 48-4] Feb. 9 2 O|| 136-00 |) 523-5] 48.6 || 924-2) 49.6 
5 O}] ceeeeeeee 529-0} 50-5 || 935-2] 50-1 5 O|| 133-40 || 524-5] 52-6 || 913-4) 53-1 
20 O}] 125-30 || 515-4| 44-6 || 948-0] 46-0 20 O}] 131-49 || 522-2] 48-3 || 914-0] 48-6 
23 Oj] 126-00 || 519-6| 45-6 || 948-2] 45-6 23 O|| 133-44 || 519-3} 49-1 || 914-2] 49.6 
Jan. 28 2 0|| 127-83 || 529-2| 49-1 || 933-1] 49-1] Feb. 10 2 O}) 137-41 || 528-2} 51-5 || 909-6] 51-8 
5 O}] 127-70 || 529-7| 506 || 931-9] 50-4 5 O}} 134-35 || 528-4] 52-6 || 916-9) 52.6 
20 0O|| 130-75 || 521-2) 44-6 || 926-5] 45.8 20 O}] 132-10 || 522-2} 50-6 || 891-8} 51-4 
23 0|| 129-47 || 522.7] 47-1 || 929-9] 48-5 23 O|] 131-73 || 520-2) 52-6 || 899-1] 53-5 
Jan. 29 2 O|| 133-31 || 521-5] 50-6 || 907-6| 51-1] Feb. 11 2 O|] 138-30 || 521-5] 54-1 || 879-5] 54-7 
5 O}| 130-35 || 521-4] 52-1 || 916-4] 52-6 5 0] 137-32 ||. 530-7) 53-1 || 904-8] 53-2 
Jan. 30 20 O|| 127-83 |) 517-5| 38-7 || 931-2] 39-0 20 O|| 131-65 || 515-3| 59-6 || 758-6) 60-7 
23 O}] 128-41 || 511-4| 39-7 || 946-2] 39-9 23 O}| 134-47 || 511-2| 56-1 || 852-3) 57-3 
Jan. 31 2 O|| 131-96 || 519-0| 44.9 || 921.3] 45-9 | Feb. 12 2 0} 139-70 || 530-6) 56-8 || 871-0] 58-4 
5 0O|| 129-01 || 527-1} 48-1 || 914-5] 47-6 5 O|| 139-05 || 530.2) 57-0 || 905-4) 58-2 
Bririzar. k=0:0001248 g=0-000304=2'44 Scale divisions. 
BALANCE. Jan. 124—Jan. 224 k=0:0000127 g=0:000073=5'75 Micrometer divisions. 
» Jan. 234—March 214 5h k=0:0000140 g=0:000073=5-20 Micrometer divisions. 
Jan 194 24, "Two fibres of the suspension thread of the Declinometer found broken; the loose fibres removed, but the plane of 
detorsion had evidently varied considerably. 
Jan. 204 6h, Suspension thread of Declinometer broke away fibre by fibre during the term observations. 
Jan. 214, Subsequent circumstances inclined Mr Russell to believe that the stretching and breaking of the fibres alluded to 
above must have arisen from the silk being defective at that part of the reel from which the threads were formed. 
| A new thread prepared. It was allowed to stretch for several days, in consequence of the breaking of the last. The torsion was 
then removed. Torsion circle reading 280°. 
