6 Day OBSERVATIONS OF MAGNETOMETERS, NOVEMBER 14. 1841—January 17. 1842. 
Gottingen BIFILAR, BALANCE. Gottingen BIFILAR. BALANCE. 
Mean Time of DECLINA- Mean Time of Deen A= 
Declination TION, Cor- |Thermo-|| Cor- |Thermo Declination TION. Cor- |Thermo-|| Cor- |Thermo- 
Observation. rected. | meter. |] rected. | meter. Observation, rected. | meter. || rected. | meter, 
a GO, i). som. , Se. Div. es Mic. Div. 2 dias m| ig Se. Diy. o Mie, Div, 2 
Nov. 14 20 0] 132-64 || 500-2} 31-9 |} 651-0} 32-1 Nov. 22 20 0|| 130-22 || 507-4] 36-8 || 632-1] 37.0 
23 O|| 131-24 |} 500-2} 32-6 |} 656-9] 32-5 23 O}] 126-23 |) 499-3) 38-1 || 638-5] 37-7 
Noy. 15 2 0O]| 132-30 || 505-6] 35-6 || 663-7] 34-6 Nov. 23 2 0O|| 131-20 || 496-7] 39-7 || 650-0} 39-1 
5 O|] 130-15 || 506-9} 35-8 |) 660-2} 35-0 5 0O|| 127-57 || 503-0] 40-5 || 662-0} 40-0 
20 0O|| 129-36 || 498-5] 30-3 || 656-8} 30-6 20 O|| 127-48 || 505-2) 38-2 || 635-1] 38-3 
23 0|| 129-67 || 504-5] 33-5 || 660-7} 32-6 23 O|] 129-18 || 503-6] 40-7 || 636-7] 39-8 
Nov. 16 2 0}| 130-90 || 513-4] 42-4 || 637-2} 39-9 | Nov. 24 2 O|| 132-10 || 498-6| 44-7 || 652-2] 43-7 
5 O|| 129-07 || 513-6] 43-4 || 633-1] 41-5 5 O}| 129-00 || 505-1] 44-5 || 650-0] 43-5 
20 O|| 128-38 || 502-8] 30-8 || 643-6} 31-1 20 O|| 125-58 || 505-2} 36-8 || 627-1] 37-2 
23 0O|| 131-67 || 500-6] 31-4 || 641-8] 31-2 23 O|] 128-15 || 503-6} 36-8 || 617-0] 36-7 
Nov. 17. 2. 0|| 134-59 || 507-0] 41-0 || 646-9] 38-7 | Nov. 25 2 O|| 130-10 | 517-1] 45-4 || 615-2) 43.3 
5 O}] 132-33 || 514-4] 46-2 || 634-6] 44-0 5 O|| 127-68 | 515-0] 48-5 |) 611-0} 46-8 
20 O|| 129-07 |} 493-1] 27-9 || 650-3] 28-5 20 O|| 126-92 || 499-9] 35-0 || 639-9] 35-7 
23 O|] 132-22 || 498-1] 27-8 || 647-9] 27-9 23 O|] 128-05 |) 502-1} 35-5 || 638-8} 35-5 
Noy. 18 2 0|| 133-00 || 520-6| 36-3 || 646-2] 34-6 | Nov. 26 2 O|| 132-05 || 514-9] 42-5 || 632-1] 41-0 
5 O}] 132-84 || 518-7] 37-3 |} 655-8] 35-7 5 O|| 128-63 || 517-7| 48-6 || 626-9| 45-1 
20 O|| 148-57 || 440-7| 31-9 || 580-8] 32-1 20 O}| 129-10 || 510-5] 46-6 || 634-2] 47-2 
23 O|| 139-16 || 499-3] 34-1 || 706-8] 33-1 23 0] 130-83 || 507-7| 46-6 || 610-3] 46-3 
Nov. 19 2 Off ceseseeee |] ceeeee | ceeeee |] ceseee Po reeees Noy. 27. 2 0O|| 131-90 || 512-3) 49-8 || 606-0] 48-8 
5 O|] 134-12 || 509-6] 44-2 || 727-1] 42-0 5 O}] 131-82 | 511-8] 50-4 || 625-2] 49-1 
20 O|] 132-11 || 491-2] 32-7 || 607-8| 33-3 | Nov. 28 20 0O]| 129-03 || 505-7] 39-8 || 633-2] 40-2 
23 O|] 135-28 || 468-1] 32-9 || 704-6] 32-9 23 O|] 129-49 || 505-1] 41-2 || 624-7} 40-8 
Noy. 20 2 0O|| 136-40 || 502-8] 36-9 || 752-5] 36-0 | Nov. 29 2 0] 132-30 || 516-1] 48-0 || 613-6] 46-4 
5 0|| 129-00 || 508-6] 39-7 || 725-0} 38-3 5 O}} 129-98 |) 516-7} 50-6 || 612-2) 49-1 
Noy. 21 20 0|| 126-78 || 503-9] 35-3 || 659-4] 35-5 20 O|] 129-63 || 511-8} 45-3 || 604-5} 45-3 
23% 0 129-95 494-8 36-4 658-0 36-0 Dae Dillh seve deere Whe ciecice \Pieaseee: I viens veil) <nnldaw 
Noy. 22 2 0O|| 131-47 || 507-1] 38-7 || 650-4] 38-0 | Nov. 30 2 0O]] 128-80 || 516-2] 49-1 || 609-0] 47-7 
5 O]] 129-30 |} 503-2| 40-7 || 678-5] 39-5 5 O|] 127-83 || 516-0} 49-9 || 606-7) 48-8 
1842. 
Jan. 12 20 0] 127-32 || 510-5] 40-0 || 922-1] 41-5 | Jan. 14 20 0] 127-78 || 516-7} 40-1 | 944-3] 41-0 
23 0|| 130-40 || 507-4] 39-2 || 950-0} 40-5 23 0O|| 128-83 || 517-5} 43-0 || 943-0} 44-0 
Jan. 13 2 O|| 130-27 | 519-4] 44-6 || 935-4] 45-9 | Jan. 15 2 O]/ 132-15 || 526-9] 48-1 || 910-3] 48.9 
5 O} 130-52 || 518-9] 46-0 || 941-2] 47-6 5 0] 130-13 || 522-2) 47-7 || 924-3] 48-5 
20 0} 127-77 || 509-0} 35-1 || 952-5) 35-6] Jan. 16 20 0] 128-25 || 513-4] 34-5 || 964-0] 34-3 
23 0}| 130-09 || 510-7] 35-6 || 967-2] 36-0 23 0} 129-40 || 508-0} 37-3 || 981-1] 37-1 
Jan. 14 2 O}f 130-58 || 525-5] 44-6 || 939-8] 44-6 | Jan. 17 2 0] 131-95 || 521-8] 45-2 || 937-5] 44-6 
5 0} 128-98 || 523-0] 45-6 || 938-9] 45.8 5 O]] 129-72 || 521-9} 48-6 || 927-9} 47-9 
Brrivar. k=0:0001248 g=0:000304=2'44 Scale divisions. 
Bavance, Oct. 64 —Novy. 30¢ k=0:0000118 g=0:000073=6:20 Micrometer divisions. 
i Jan. 124 —Jan, 224 k=0:0000127 g=0:000073=5.75 Micrometer divisions. 
Dec. 44. The declination magnet found to haye untwisted the suspension roller, to have sunk down and rested on the copper 
ring, which had severed some of the fibres of the suspension thread. Thread removed, and a new one prepared. 
Dec. 64. Fibres of the new thread found unequally stretched. 
Dec. 84. A satisfactory thread obtained, which was attached to the suspension roller, and the torsion removed. 
Dec. 202. On Mr Russell’s return from Hdinburgh he found the thread so much stretched as to bring the stirrup in contact with 
the copper ring; it was therefore wound up a little, and the torsion removed, preparatory to the term-day observations, 
Dec. 234 0%, (Term day.) Declination magnet again found in contact with the copper ring, from the stretching of the thread. 
Magnet wound up. 
Dec. 284, The short scale removed from the declination magnet, and a long one attached. (‘Torsion removed ?) 
Jan. 14 et seg. Observations made to determine the temperature correction for the Balance magnet. Instrument readjusted. 
