10 DAILY OBSERVATIONS OF MAGNETOMETERS, APRIL 6—May 4. 1842. 
Gottingen BIrILar. BALANCE, Gottingen BIFILAR. BALANCE. 
Mean Time of || Decrrna- Mean ‘Mimelof | |(DeonnNs=|)————= > — | rr 
Declination TION, Cor- |Thermo-| Cor- |Thermo Declination TION. Cor- |Thermo-) Cor- |Thermo 
Observation. rected. | meter. || rected. | meter. Observation. rected. | meter. || rected. | meter. 
eas D. e M. U Se. Diy. a Mice. Div, g iA see od if Se. Div. z= Mic. Div S 
Apr. 6 20 0} 127-67 517-3| 46-6 || 902-0] 46-8 | Apr. 20 20 0] 133-20 || 511-8) 957-1 || 859-1] 58:7 
23 0|| 133-77 || 511-0! 46-9 || 886-7] 46-6 23 0O|| 137-70 || 508-8) 58-6 || 860-8) 59-5 
Apr. 7 2 O]| 138-93 524-8| 47-9 | 883-0) 47-4 |} Apr. 21 2 0} 140-33 || 526-6 63-7 || 845-7! 63-1 
5 0] 133-51 || 529-5] 49-1 | 883-0] 48-1 5 0} 135-75 || 529-0) 66-9 || 919-2! 66-7 
20 0} 127-80 || 517-2| 42-7 | 900-8} 43-0 20 0} 130-52 || 513-3) 53-6 || 870-7) 54-1 
23 O| 133-78 || 512-5| 44-6 || 888-3] 44-2 23 0) 134-33 || 519-9| 55-0 || 887-8] 55-1 
Apr. 8 2 O|| 140-47 | 530-6 51-1 || 855-8] 49-1 | Apr. 22 2 0|| 137-98 || 531-4} 62-0 || 861-4} 60-2 
5 0O|| 135-65 | 537-0| 56-1 | 878-5) 55-2 5 O|| 137-58 || 529-2} 62-6 || 867-0) 63-1 
20 O| 128-77 || 512-1) 42-2 || 900-9) 42-8 20 0} 128-48 || 518-6) 49-9 | 868-8) 49-6 
23 0] 132-85 || 507:6| 43-7 || 882-0] 43-5 23 Oj) 130-90 || 511-6) 50-6 || 884-5] 50-1 
Apr. 9 2 0] 140-47 || 524-9] 50-1 869-3| 48-1 | Apr. 23 2 0|| 137-80 || 529-5| 54-6 || 857-7| 54-4 
5 0] 135-02 || 532-1] 55-6 |) 878-1] 52-9 5 O|| 132-47 | 536-3) 62-6 || 865-8} 60-0 
Apr. 10 20 0] 134-44 || 505-9| 44-6 787-7| 45-3 | Apr. 24 20 0|| 120-85 || 518-1; 50-6 | 867-4| 50-6 
23 0|| 144-32 || 493-4] 45-6 || 852-2] 45-6 23 0O|| 132-20 || 511-3) 51-3 || 855-6] 50-9 
Apr. 11 2 O]| 142-46 || 518-2) 50-6 | 912-1 49-1 | Apr. 25 2 0} 137-63 | 529-9] 57-6 || 855-7] 56-2 
5 0] 140-73 || 537-5] 53-1 || 969-7] 51-1 5 O]) 134-44 || 541-4] 62-2 | 849-8] 59-9 
20 0] 126-43 || 511-9] 42-2 | 881-9] 42-1 20 0} 128-01 || 522-0; 49-1 || 873-7] 49-1 
23 0|] 132-80 || 514-9] 44-5 || 897-6] 44-0 23 0}| 131-67 || 517-5; 50-8 || $50-9| 50-3 
Apr. 12 2 0} 140-55 | 514-6} 48-0 | 935-5) 46-6 Apr. 26 2 O| 137-77 || 534-7| 57-6 | 808-3] 55-7 
5 0] 136-33 || 536-1) 51-0 | 964-0] 48-6 5 O|} 135-02 |) 541-9} 61-6 | 846-6] 59-2 
20 0|| 131-30 || 467-0} 41-7 || 880-8| 41-8 20 O}] 126-35 || 520-0) 46-6 || 865-7] 47-1 
23 O]] 149-15 || 477-6] 42-9 || 863-6| 42-7 23 O|| 131-62 || 513-6) 49-2 || 861-1} 48-8 
Apr. 13 2 0] 147-95 | 536-3] 45-6 1041-6] 44-6 |Apr. 27 2 O|| 136-62 || 527-0 55-1 |) 852-4) 53-4 
5 O]} 139-30 || 530-4] 47-9 || 932-1] 46-2 5 O|| 135-65 || 540-3] 59-3 || 841-2] 56-6 
20 O]| 128-75 || 506-1) 41-7 || 903-9) 41-5 20 O]| 128-83 || 519-3] 47-5 | 867-6] 47-8 
23 O]| 133-13 || 500-7] 42-7 || 916-6] 42.5 23 0]}) 131-69 || 516-8| 48-6 || 859-6] 48.4 
Apr. 14 2 0] 140-10 || 512-2] 44-6 | 896-3] 44-1 } Apr. 28 2 O|| 137-43 || 530-7] 54-3 || 829-5| 52-5 
5 0O|| 136-62 | 531-1| 46-6 || 907-4| 45-9 5 0] 135-63 || 547-2} 59-8 || 808-7} 52-1 
20 0} 152-33 || 454-9] 43-7 | 579-6) 43-5 20 O]| 127-54 || 518-9] 46-3 | 853-7] 46-9 
23 0] 142-47 || 467-2) 44-2 || 885-1] 44-0 23 0]| 132-93 || 517-7] 50-1 || 854-7) 49.4 
Apr. 15 2 0] 144-34 || 507-4] 45-6 | 931-4] 45-1 | Apr. 29 2 O|| 137-74 |) 533-4] 57-1 || 832-1] 55-2 
5 0} 136-92 || 559-8| 47-1 1063-2) 46-1 5 0] 138-82 || 543-8] 61-4 | 844-9] 59-2 
20 20] 146-03 || 499-3] 42.7 | 862-9] 43-8 20 O}] 130-16 || 518-2) 48-1 || 874-6| 48-4 
23 0} 136-15 | 510-5] 44-6 | 892-7} 44-0 23 0}} 134-13 || 512-1] 49-1 || 852-4] 49-0 
Apr. 16 2 0] 141-05 || 512-7] 47-6 || 933-4| 46.2 | Apr. 30 2 0] 140-53 || 526-7) 52-8 || 842-5) 51-5 
5 0} 137-75 || 533-4) 52-1 | 932-8] 49-2 5 O|| 138-34 || 535-4] 55-8 || 858-2] 54-1 
Apr. 17 20 0]| 133-53 || 521-4] 43-2 || 881-6] 43-4 May 1 20 0O]| 128-63 || 530-0] 47-9 || 863-3) 48-1 
23 0]}| 134-13 |) 503-5] 44-6 || 892-1] 44.2 23 O|| 134-70 || 520-4} 50-4 || 844-0] 49-8 
Apr. 18 2 0O|| 141-80 || 518-8] 52-6 || 873-7] 49-7 May 2 2 O}] 142-88 || 532-1] 56-3 || 822.2) 54-6 
5 0} 133-82 | 535-9| 59-7 || 924-2] 56-7 5 0|| 137-45 || 538-9) 60-0 || 840-9] 58-1 
20 0} 134-50 || 522-6] 49-4 | 858-0}. 49-4 20 0O|| 130-60 || 519-2) 47-0 | 866-6} 47-8 
23 0} 136-68 || 507-9| 51-3 || 880-8} 50-6 23 30)| 136-82 | 519-6] 50-5 || 857-3) 49-9 
Apr. 19 2 0] 144.35 || 529.0] 57-3 || 874-6| 55-3 May 3 2 O|| 142-06 || 530-1) 56-1 || 843-9) 54-3 
5 0] 134-38 || 540-4] 62-6 |) 920-3} 60-2 5 0O|| 136-93 || 534-2) 60-0 || 853-7} 58-2 
20 0} 129-37 || 518-0] 50-0 || 879-8) 50-1 20 O}| 131-22 || 527-0) 52-9 || 858-7] 53-4 
23° 0} 136-05 || 512-0] 52-6 || 865-5] 51-6 23 0}| 133-35 |) 514-6] 53-1 || 845-0] 53-0 
Apr. 20 2 0] 143-68 || 523-9] 59-4 || 852-3] 57-2 May 4 2 O|| 138-96 || 527-3} 55-7 || 836-6] 55-0 
4 0} 137-63 | 546-6) 64.8 | 894-9} 61-7 5 0|| 135-65 || 537-5] 58-8 |) 841-1] 57-6 
Birinar. k=0:0001248 g=0:000304=2'44 Scale divisions. 
Batancre. Mar. 214 20—April 164 k=0-0000118 g=0:000073=6-20 Micrometer divisions. 
April 174 =—Oect. 84 k=0-0000130 g=0:000073=5-60 Micrometer divisions. 
April 154 20%. Observation 20™ late, caused by error in the house clock. 
April 224 20%, he previous observations were made by Mr Russell; for the following Iam responsible. J. A, B. 
May 24 23%, Observation 30™ late, omitted while observing Polaris. 
