14 DAILY OBSERVATIONS OF MAGNETOMETERS, JuLY 18—AvcGustT 12. 1842. 
Gottingen BIFILAR. BALANCE. Gottingen BIFILAR. BALANCE. 
Mean Time of || DEcz1na-|__——__ |—__——_] Mean Time of || Deciina- {—£2———_||——__—___ 
Declination | ‘TION. Cor- lermo- Cor- |Thermo eee TION. eer pee a Thermo- 
Observation. | rected. | meter. || rected. | meter. servation. rected. | meter. || rected. | meter. 
os eltiaiees Ei ywact tate 
a, b.. m.|] t Se. Div. ° Mie. Div.) 2 ad oh m. 4 Se. Div. 2 Mic. Div, 2 
July 18 20 0 | 125-88 || 537-2] 59-5 || 772-9| 59:5 July 31 20 0O}| 124-27 || 519-1| 60-9 || 714-0| 61-3 
23 0|| 129-05 || 534-0] 59-8 || 792-2| 59-6 23 O}| 129-69 || 519-9| 63-4 || 789-6] 62-8 
July 19 2 0} 134-75 || 530-2) 61-3 800-0| 60-5 |Aug. 1 2 0] 130-72 | 555-0] 69-5 || 798-1| 67-7 
5 O|| 132-82 || 544-4] 62-7 || 808-4) 61-7 5 0} 134-75 || 564-6] 74-3 || 772-2] 72-0 
20 0O|| 132-40 || 523-2] 56-8 || 794-7] 56-6 20 O|| 124-72 || 527-5} 62-5 || 784-0} 62-9 
23 0} 130-30 || 521-4] 57-1 |) 806-6| 56-8 23 30]| 127-80 || 531-7| 65-7 || 758-1) 65-2 
July 20 2 0} 132-27 || 540-3] 58-5 || 798-9 57-9 }Aug. 2 2 0] 135-20 || 541-5| 67-7 || 756-3] 66-7 
5 0} 132-30 || 547-3] 58-8 || 816-3) 58-3 5 0}; 130-90 || 543-8} 70-7 || 763-0] 69-2 
20 O|| 120-93 || 530-8] 59-1 || 803-5] 59-2 20 0}) 126-00 |) 528-4] 58-8 || 799-4} 59-4 
23 O|] 125-22 || 526-9] 60-6 || 786-5} 60-1 23 0} 127-98 || 531-0) 61-8 || 778-3] 61-3 
July 21 2 O| 132-38 || 538-9] 63-2 |) 794-1) 62-3 Aug. 3 2 0O|| 133-38 || 541-6| 68-0 || 758-8] 66-5 
5 0O|| 130-52 || 543-8] 62-7 || 798-5| 63-1 5 0O|| 128-47 | 545-5| 70-6 || 761-2] 69-0 
20 O|] 121-15 || 527-3] 55-4 || 822-0) 55-4 20 O|}] 125-62 || 530-0} 61-3 || 788-2} 61-7 
23 0} 125-55 || 527-4) 56-3 || 819-9] 56-1 23 O|| 128-30 | 518-5] 61-2 || 780-0) 61-5 
July 22 2 0} 133-67 || 548-1) 59-1 794:8| 58-2 }Aug. 4 2 O|| 132-65 | 539-7| 63-5 || 774-7] 62-9 
5 0] 132-84 || 558-7| 62-5 || 807-9} 60-7 5 0O|| 129-49 || 557-9] 65-6 || 773-0| 64-7 
20 0} 131-75 || 521-0] 52-9 |) 779-3} 53-1 20 || 128-40 || 531-3} 62-3 || 729-3] 62-0 
23 0] 128-88 || 524-7] 55-3 | 800-7} 54-9 23 O|| 138-92 | 517-3] 64-7 || 766-7] 63-8 
July 23 2 O|| 136-45 || 542-4] 62.6 | 801-6| 60-6 Aug. 5 2 0] 136-95 | 548-4] 67-0 || 760-2] 65-8 
5 0} 130-73 || 571-7| 70-4 || 825-9| 67-3 5 0] 131-65 || 548-0] 67-4 || 793-0] 66-5 
July 24 20 0}; 123-05 || 528-9] 62-3 783-9| 62-4 20 O|| 131-78 || 506-9) 56-9 || 714-8] 57-3 
23 0|) 128-87 || 519-1) 63-9 || 786-8} 63-3 23 O|| 125-82 | 494-9] 58-8 || 792-4] 58-6 
July 25 2 0} 135-22 || 538-3] 64-9 | 782-5) 65-0 Aug. 6 2 O0|! 134-82 || 529-2] 62.6 || 794-2] 61-6 
5 0|| 130-83 || 545-3] 68-2 | 788-7| 66-8 5 0|| 124-07 || 531-6} 65-6 || 880-9] 64-1 
20 0|| 122-87 || 529-2| 60-4 || 798-2} 60-4 | Aug. 7 20 0} 123-13 || 532-1) 57-9 || 774-6] 58-1 
23 0} 130-09 || 523-3] 63-1 || 780-6| 62-3 23 0}| 129-08 || 519-5) 59-8 | 787-7} 59-3 
July 26 2 0} 134-83 || 544-1] 66-2 || 761-0} 65-0 Aug. 8 2 O|| 132-51 || 540-0) 64-0 || 786-7) 62-7 
5 0] 130-83 || 548-8] 68-1 || 783-9) 66-6 5 O|| 129-49 || 548-6) 65-4 || 791-2) 64-1 
20 O}] 121-38 || 528-9] 60-4 || 794-8| 60-5 20 O|| 124-59 | 533-3) 62-8 || 770-2| 62-7 
23 0] 128-54 |) 527-9] 62-9 || 780-9| 62-3 23 O}| 126-98 | 530-0] 64-9 || 755-3] 64-1 
| July 27 2 0} 136-95 |] 542.9] 65-9 || 773-5| 64-9 Aug. 9 2 0} 133-05 | 533-2] 67-9 || 765-3] 66-7 
5 0O]| 132-91 || 553-8] 67-4 || 793-2) 66-3 5 0] 130-18 || 547-1] 69-9 || 762-0| 68-5 
20 0} 123-00 || 530-4} 58-6 || 798-7| 59-1 20 O|| 124-62 | 537-2) 63-8 || 779-6} 63-8 
23 0} 127-23 || 525-6] 59-5 || 798-8| 59-5 23 0|| 127-47 || 526-8] 66-8 || 769-0] 66-2 
July 28 2 0] 135-03 || 544-8] 60-9 || 776-1| 60-6 Aug.10 2 Of 132-55 |) 542-3) 72-1 || 746-6} 70-6 
5 0O|| 131-90 || 551-2] 63-8 || 802-1] 62-7 5 O}] 128-97 || 551-4] 73-2 || 754-6| 71-9 
20 O} 122-70 |} 524.6] 56-9 || 812-4] 57-1 20 0O|| 123-82 || 526-8) 63-9 || 753-9] 64.2 
23 0]| 126-80 |} 520-2) 57-7 || 791-1} 57-6 23 O|| 126-32 |) 525-3} 62-8 || 770-1) 63-3 
July 29 2 O|| 134-48 || 555-1] 59-8 || 753-3) 59-2} Aug. 11 2 O1|) 132-80 || 537-6) 64-6 || 790-4] 64-5 
5 0|| 134-07 || 547-7) 61-5 | 800-5| 60-7 5 0|| 129-92 || 556-5| 68-5 || 784-8] 65-2 
20 0O|| 123-87 || 524-5) 54-5 || 797-4] 54-9 20 O|| 123-07 || 530-3) 60-7 || 771-1] 60-7 
23 0|| 127-87 || 521-6) 57-4 || 793-2| 56-7 23 O}] 137-12 || 518-2] 62-8 || 772-5) 62-2 
July 30 2 0] 133-13 || 540-5] 61-7 || 770-2) 60-4 | Aug. 12 2 O|| 134-20 || 537-4] 65-6 || 764-7| 64-5 
5 0} 132-31 || 554-2] 64-4 || 801-7} 63-0 5 O]| 129-82 | 542-7) 66-9 || 784-8] 65-9 
BirinarR. k=0:0001248 g=0:000304=2-44 Scale divisions. 
BaLance, April 174—Oct. 84 k=0-0000130 q=0:000073=5'60 Micrometer divisions. 
DECLINATION. Torsion removed. Circle reading 4°. July 194 20h, 61°. (See note below.) July 204 6h, 80°. July 224 
74, 101°. July 254 214, 108°. July 294 6b, 118°. Aug. 14 214, 110°. Aug. 54 62, 124°, Aug. 84 214, 118°. 
July 184 20", A fibre of Declination suspension thread found broken. Torsion removed. Observation at 20% corrected for 
torsion by — 3"°35. 
July 194 5», A thread prepared on May 26, and having a brass weight suspended by it since, was now inserted, This thread 
is composed of 20 fibres, instead of 16, as formerly. The torsion was completely removed, Brass bar left in during the night. 
July 194 205, Observation of Declination 43™ too late, delayed during the elimination of torsion. 
July 20464, The Bifilar reading is 53™ too late ; omitted accidentally. 
July 224 20>; 294 5h; 314 20h; Aug. 44, Extra observations. 
Aug. 14 235, Observation 30™ late. 
a en Eee 
