Daily Observations of Magnetometers, February 13 — March 11. 1842. 



Gbttingen 



Mean Time of 



Declination 



Observation. 



d. h. in. 



Feb. 13 20 



23 



Feb. 14 2 



5 



20 



23 



Feb. 15 2 



5 



20 



23 



Feb. 16 2 



5 



20 



23 



Feb. 17 2 



5 



20 



23 



Feb. 18 2 



5 



20 



23 



Feb. 19 2 



5 



Feb. 20 20 



23 



Feb. 21 2 



5 



20 



23 



Feb. 22 2 



5 



20 



23 



Feb. 23 2 



5 



20 



23 



Feb. 24 2 



5 



20 



23 



Feb. 25 2 



5 



Declina- 

 tion. 



13217 

 130-96 

 137-17 

 133-24 



130-10 

 130-33 

 134-90 

 132-80 



129-82 

 131-78 

 135-02 

 134-42 



129-87 

 132-33 

 140-30 

 118-15 



130-75 



138-49 

 140-52 

 121-33 



133-62 

 135-73 

 136-35 

 135-57 



BiriLAR. 



Cor- 

 rected. 



Sc. Div. 



518-3 

 510-7 

 518-7 

 526-4 



526-8 

 521-7 

 526-0 

 533-9 



519-6 

 518-0 

 527-9 

 531-0 



514-3 

 514-9 

 514-5 

 531-6 



526-8 

 514-8 

 533-0 

 539-5 



518-9 

 517-5 

 514-2 

 517-4 



511-2 



522-4 



511-4 

 513-3 



528-7 

 528-1 



515-9 

 516-8 

 524-6 

 526-0 



525-2 

 518-9 

 542-6 

 527-6 



506-7 

 510-5 



522-7 

 526-9 



Tliermo- 

 meter. 



39-2 

 39-2 

 41-2 

 44-5 



50-4 

 51-0 

 54-6 



58-8 



48-6 

 49-6 

 52-9 

 55-6 



47-6 

 48-6 

 51-4 

 52-9 



50-6 

 50-1 

 53-9 

 55-8 



49-3 

 49-8 

 51-6 

 52-5 



43-6 

 48-6 



38-7 

 39-9 

 46-6 

 51-1 



43-2 

 45-1 

 49-6 

 49-8 



47-7 

 48-1 

 52-6 

 55-1 



42-7 

 43-7 

 45-9 

 48-6 



Balance. 



Cor- 

 rected. 



923 

 951 

 906 

 895 



937 

 924 

 908 



888 



873 

 895 

 869 

 969 



972 

 958 

 925 

 929 



Mic. Div 



920-6 

 931-5 

 924 

 923 



889 

 899 



885 

 868 



909 

 906 



887 

 888 



896 



920 



926 



1065 



905 



911 



909 



1020 



910 

 921 



947 

 963 



907 

 940 

 922 



Thermo- 

 meter. 



39-0 

 39-5 

 40-8 

 44-0 



50-6 

 51-5 

 54-7 

 59-4 



50-1 

 49-9 

 52-6 

 55-5 



48-6 

 49-1 

 51-5 

 53-1 



51-1 

 50-8 

 54-1 

 55-7 



49-9 

 50-1 

 51-6 

 52-3 



43-5 



44-8 

 48-6 



39-5 



40-6 

 46-5 

 49-8 



44-0 

 45-1 

 48-9 

 49-6 



48-9 

 49-2 

 531 

 54-6 



43'-5 

 44-0 

 46-1 



48-2 



Gottingen 



Mean Time of 



Declination 



Observation. 



d. h. m. 



Feb. 25 20 



23 



Feb. 26 2 



5 



Feb. 27 20 



23 



Feb. 28 2 



5 



Mar. 1 20 



23 



Mar. 2 2 



5 



20 



23 



Mar. 3 2 



5 



20 



23 



4 2 



5 



Mar. 



Mar. 



20 



23 



5 2 



5 



Mar. 6 20 



23 



Mar. 7 2 



5 



20 



23 



Mar. 8 2 



5 



20 



23 



Mar. 9 2 



5 



20 



23 



Mar. 10 2 



5 



20 



23 



Mar. 112 



5 



Declina- 

 tion; 



131 



30 



134 



58 



136 



30 



133 



55 



130 



73 



134 



25 



136 



92 



139 



10 



132 



80 



128 



98 



131 



92 



136 



62 



131 



27 



131 



•52 



1.34 



79 



134 



35 



132 



62 



128 



63 



130 



60 



134 



99 



135 



70 



128 



77 



129 



95 



132 



33 



128 



90 



128 



10 



132 



20 



132 



30 



124 



10 



128 



27 



131 



25 



121 



23 



123 



87 



125 



80 



131 



15 



127 



63 



124 



63 



127 



21 



132 



33 



127 



80 



BiFILAR. 



Cor- 

 rected. 



Thermo- 

 meter. 



Sc. Div. 



524-2 

 515-1 

 525-6 

 532-2 



518-0 

 513-8 

 5270 



510-4 

 520-2 



515-8 

 513-6 

 521-1 

 531-1 



5221 

 517-3 

 525-6 

 531-7 



516-8 

 523-2 

 525-4 

 537-5 



520-1 

 514-9 

 528-0 

 530-4 



524-1 



528-4 

 531-8 



522-2 

 514-7 

 525-1 

 527-5 



515-3 

 512-1 



527-7 

 5280 



519-4 

 513-6 

 521-1 

 534-6 



53-6 

 51-4 

 54-2 

 58-3 



38-7 

 42-7 

 50-1 



41-2 

 41-2 



38-8 

 40-4 

 45-2 

 48-1 



471 

 48-6 

 51-6 

 54-4 



45-1 



47-1 

 52-6 

 52-8 



42-7 

 45-8 

 52-0 

 52-1 



49-1 



53-0 

 53-1 



44-5 

 45-1 

 48-1 

 50-1 



42-7 

 44-5 

 48-9 

 49-9 



43-7 

 45-6 

 48-6 

 52-6 



Balance. 



Cor- 

 rected. 



Thermo- 

 meter. 



Mic. Div. 



860-7 

 885-7 

 879-5 

 859-5 



953-2 

 911-3 

 863-6 



919-6 

 948-8 



903-3 

 906-6 

 890-4 

 890-9 



880-8 

 877-1 

 862-2 

 864-9 



892-6 

 890-9 

 866-3 

 911-5 



896-9 

 897-5 

 860-5 

 880-7 



875-8 



857-9 

 889-3 



8930 

 895-0 

 868-5 

 905-2 



893-2 

 907-7 

 872-4 

 869-4 



898-0 

 894-4 

 868-3 

 857-6 



Bifilar. fc=0-0001248 5=0-000304=2-44 Scale divisions. 

 Balance. Jan. 23'i— March 21'i 5^ ^=0-0000140 <i=0000073=5-20 Micrometer divisions. 



Feb. 20*1. Torsion suspected in Declinometer thread. Torsion tried, estimated at 10°. Circle turned to 270°. This torsion is 

 in an opposite direction from what was suspected. Left with brass bar suspended. 



Feb. 21'i. The bar had come to rest 50° or 60° to the W. of north ; it was allowed to hang for a day or two, when it was found 

 still in the same position ; so that the estimation of Feb. 20* was probably inaccurate. 



Feb. 25d Torsion removed. Circle reading 330° 30'. It seemed to Mr Russell that the shifting of the magnet, for the purpose 

 of maliing the Dip observation, was, in some way, connected with tliis change of the plane of detorsion. 



