Daily Observations of Magnetometers, January 17 — February 12, 1842. 



T 



Gottingen 



MeaJl Time of 



Declination 



Observation. 



h. h. m. 



Jan. 17 20 



23 



Jan. 18 2 



5 



20 



23 



Jan. 19 2 



5 



20 



23 



Jan. 20 2 



5 



Jan. 21 20 



23 



Jan. 22 2 



5 



Jan. 23 20 



23 



Jan. 24 2 



5 



20 



23 



Jan. 25 2 



5 



20 



23 



Jan. 26 2 



5 



20 



23 



Jan. 27 2 



5 



20 



23 



Jan. 28 2 



5 



20 



23 



Jan. 29 2 



5 



Jan. 30 20 



23 



Jan. 31 2 



5 



Declina- 

 tion. 



128-34 

 12703 

 128-14 

 127-60 



127-58 

 129-30 



125-30 

 12600 

 127-83 

 127-70 



130-75 

 129-47 

 133-31 

 130-35 



127-83 

 128-41 

 131-96 

 129-01 



BiFILAR. 



Cor- 

 rected. 



Thermo- 

 meter. 



Sc. Div. 

 523-0 

 515-9 

 516-3 

 510-0 



513-4 

 512-7 

 527-4 

 526-0 



522-3 

 511-9 

 524-9 

 525-5 



517-6 

 504-4 

 517-2 

 522-4 



508-8 

 525-4 

 523-4 



508-7 

 513-4 

 530-5 

 522-0 



514-5 

 512-6 

 513-8 

 519-7 



518-1 

 515-4 

 525-9 

 529-0 



515-4 

 519-6 

 529-2 

 529-7 



521-2 

 522-7 

 521-5 

 521-4 



517-5 

 511-4 

 519-0 

 527-1 



37-3 

 39-8 

 43-9 

 46-2 



39-2 

 43-2 

 52-7 

 521 



57-8 

 53-5 

 58-8 

 59-6 



46-9 

 44-3 

 46-6 

 48-8 



33-9 



44-2 

 48-3 



38-5 

 41-6 

 49-9 

 51-0 



42-7 

 44-6 

 43-8 

 45-6 



41-7 

 43-3 

 48-4 

 50-5 



44-6 

 45-6 

 49-1 

 50 6 



44-6 

 47-1 

 50-6 

 52-1 



38-7 

 39-7 

 44-9 

 48-1 



Balance. 



Cor- 

 rected. 



Thermo- 

 meter. 



Mic. Div. 



939-9 

 959-3 

 946-9 

 993-7 



947-1 

 967-4 

 946-6 

 9480 



940-7 

 955-6 

 947-4 

 955-5 



973-8 

 971-2 

 967-7 

 963-9 



978-2 

 940-4 

 958-9 



941-1 

 983-5 

 940-1 

 948-8 



948-7 

 970-4 

 967-4 

 957-1 



964-5 

 970-5 

 935-0 

 935-2 



948-0 

 948-2 

 933-1 

 931-9 



926-5 

 929-9 

 907-6 

 916-4 



931-2 

 946-2 

 921-3 

 914-5 



38-8 

 41-7 

 44-5 

 46-6 



39-8 

 43-2 

 52-6 

 52-2 



59-4 

 55-3 

 60-9 

 61-2 



49-8 

 45-4 

 49-0 

 51-1 



34-5 

 44-1 

 48-1 



39-8 

 41-4 

 ,50-1 

 50-8 



44-3 

 44-6 

 45-4 

 47-1 



42-5 

 44-1 

 48-4 

 50-1 



460 

 45-6 

 49-1 

 50-4 



45-8 

 48-5 

 51-1 

 52-6 



39-0 

 39-9 

 45-9 

 47-6 



Gottingen 



Mean Time of 



Declination 



Observation. 



d. h. m. 



Jan. 31 20 



23 



Feb. 1 2 



5 



20 



23 



Feb. 2 2 



5 



20 



23 



Feb. 3 2 



5 



Feb. 



Feb. 



Feb. 

 Feb. 



Feb. 



20 



23 



4 2 

 5 



20 



23 



5 2 

 5 



6 20 

 23 



7 2 

 5 



8 2 

 5 



20 

 23 



20 



23 



Feb. 9 2 



5 



20 



23 



Feb, 10 2 



5 



20 



23 



Feb. 11 2 



5 



20 



23 



Feb. 12 2 



5 



Declina- 

 tion. 



128-72 

 125-79 

 129-70 

 125-97 



123-40 

 127-25 

 130-82 

 130-40 



123-95 

 126-90 

 131-43 

 125-42 



124-43 

 125-97 

 132-67 

 130-83 



125-35 

 127-03 

 131-85 

 128-43 



130-90 

 128-52 

 139-60 

 135-42 



126-62 

 132-45 

 134-08 

 132-45 



132-00 

 130-93 

 136-00 

 133-40 



131-49 

 133-44 

 137-41 

 134-35 



132-10 

 131-73 

 138-30 

 137-32 



131-65 

 134-47 

 139-70 

 139-05 



BiriLAR. 



Cor- 

 rected. 



Thermo- 

 meter. 



Sc. Div. 

 525-4 

 520-2 

 520-2 

 535-5 



520-6 

 509-0 

 528-2 

 515-1 



510-0 

 513-9 

 521-1 

 526-7 



520-1 

 517-2 

 524-2 

 526-9 



518-6 

 512-2 

 518-2 

 523-0 



504-7 

 505-9 

 507-8 

 530-9 



515-3 

 514-6 

 520-4 

 525-0 



519-1 

 512-0 

 523-5 

 524-5 



522-2 

 519-3 



528-2 



528-4 



522-2 

 520-2 

 521-5 

 530-7 



515-3 

 511-2 

 530-6 

 530.2 



43-7 

 44-5 

 53-6 

 52-1 



49-9 

 50-6 

 54-6 

 56-1 



42-4 

 42-7 

 49-2 

 53-9 



48-5 

 48-6 

 51-6 

 53-4 



47-1 

 46-3 

 50-9 

 51-6 



31-9 

 34-8 

 42-7 

 49-0 



43-9 

 45-6 

 49-4 

 53-8 



46-6 

 45-1 

 48-6 

 52-6 



48-3 

 49-1 

 51-5 

 52-6 



50-6 

 52-6 

 54-1 

 53-1 



59-6 

 56-1 

 56-8 

 57-0 



Balance. 



Cor- 

 rected. 



Thermo- 

 meter. 



Mic. Div. 

 906-4 

 920-8 

 896-7 

 982-6 



908-7 

 910-8 

 930-7 

 923-5 



921-9 

 938-9 

 929-5 

 905-1 



946-0 

 919-7 

 914-5 

 911-9 



920-7 

 945-9 

 913-9 

 912-0 



906-6 

 945-9 

 939-3 

 931-4 



921-6 

 925-3 

 907-8 

 900-8 



920-9 

 922-9 

 924-2 

 913-4 



914-0 

 914-2 

 909-6 

 916-9 



891-8 

 899-1 

 879-5 

 904-8 



758-6 

 852-3 

 871-0 

 905-4 



44-3 



45-0 

 53-8 

 52-3 



50-6 

 51-1 

 54-9 

 56-7 



42-5 

 43-8 

 49-1 

 53-2 



49-4 

 49-6 

 52-0 

 541 



48-1 

 47-9 

 51-1 

 52-1 



32-1 

 35-3 



42-5 

 48-2 



45-1 

 45-8 

 49-1 

 53-6 



48-1 

 46-5 

 49-6 

 53-1 



48-6 

 49-6 

 51-8 

 52-6 



51-4 

 53-5 

 54-7 

 53-2 



60-7 

 57-3 



58-4 

 58-2 



BiFlLAR. ;t=0-0001248 ?=0-000304=:2-44 Scale divisions. 

 Balance. Jan. 12'i — .Jan. 22<i /[=0-0000127 5=0-000073=.5-75 Micrometer divisions. 



„ Jan. 23* — March 21'i 5i> /t=00000140 5=0-000073=5-20 Micrometer divisions. 



Jan 19* 2^. 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. 20* 6^. Suspension thread of Declinometer broke away fibre by fibre during the term observations. 



Jan. 21*. 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°. 



