68 



Hourly Observations of Magnetometers, December 24 — 30, 1844. 



Gottingen 



Declina- 



BlFILAR. 



Balance. 





Gottingen 





Bifilar. 



Balance. 



o — 



Mean Time 











~ "-£ 



Mean Time 



Declina- 













of Declina- 



tion. 



Cor- 



Thermo- 



Cor- 



Thermo- 



<0 .-. 



£ a 



of Declina- 



tion. 



Cor- 



Thermo- 



Cor- 



Thermo- 



0) .— 



5 c 



tion Obs. 





rected. 



meter. 



rected. 



meter. 



£> I— I 



o 



tion Obs. 





rected. 



meter. 



rected. 



meter. 



•o — 



O 



d. h. 



m. 



o 



Sc. DiT. 



° 



Mic. Dir. 



o 





d. h. 



m. 







Sc. Div. 



. 



Mic. Div. 







24 13 







25 12-60 



536-5 



34- 1 



588-4 



34-4 



W 



26 21 







25 13-70 



541-2 



33-9 



576-5 



34-5 



W 



14 







13-32 



537-1 



340 



590-6 



34-3 



W 



22 







15-07 



543-1 



340 



576-6 



34-5 



H 



15 







14-26 



537-3 



340 



591-1 



34-2 



W 



23 







14-98 



541-8 



340 



579-2 



34-5 



H 



16 







14-23 



539-6 



33-9 



591-5 



34- 1 



w 



27 







16-57 



540-5 



34-1 



582-6 



34-5 



H 



17 







14-11 



540-9 



33-8 



590-8 



340 



w 



1 







15-67 



542-9 



34-2 



583-7 



34-8 



H 



18 







14-23 



541-8 



33-8 



590-3 



340 



w 



2 







15-38 



543-9 



34-3 



585-7 



350 



H 



19 







1417 



541-9 



33-8 



589-6 



340 



B 



3 







15-59 



5410 



34-4 



593-8 



350 



H 



20 







13-77 



541-1 



33-7 



5901 



340 



B 



4 







13-79 



539-8 



34-7 



593-7 



35-1 



H 



21 







13-70 



540-4 



33-7 



590-6 



34-0 



H 



5 







13-81 



540-3 



34-7 



595-5 



35-2 



H 



22 







13-66 



537-5 



33-7 



594-4 



340 



H 



6 







13-79 



540-8 



34-8 



593-2 



35-3 



B 



23 







14-53 



536-8 



33-6 



594-5 



340 



H 



7 







13-77 



540-7 



34-8 



5931 



35-3 



B 



25 







15-54 



537-2 



33-7 



592-6 



33-9 



B 



8 







13-12 



538-6 



34-7 



593-9 



35-2 



B 



1 







16-52 



540-3 



33-6 



591-4 



33-8 



H 



9 







11-96 



535-5 



34-7 



595-7 



351 



B 



2 







15-54 



541-4 



33-6 



595-4 



33-8 



B 



10 



of 



15-25 



530-8 



34-6 



601-6 



34-9 



B 



3 







15-14 



540-4 



33-6 



596-6 



33-8 



H 



11 







13-64 



531-3 



34-4 



600-8 



34-6 



W 



4 







14-37 



540-4 



33-5 



5961 



33-8 



H 



12 



ot 



08-65 



535-6 



34-2 



600-2 



34-4 



W 



5 







13-97 



5400 



33-5 



596-2 



33-9 



B 



















6 







14-70 



5400 



33-5 



594-4 



33-9 



W 



13 



of 



25 0609 



520-4 



340 



604-0 



34-3 



W 



7 







15-27 



538-2 



33-5 



594-5 



33-8 



H 



14 



of 



03-60 



527-4 



33-9 



599-7 



34-2 



W 



8 







1514 



5351 



33-4 



597-8 



33-8 



H 



15 







07-04 



5350 



33-8 



600-6 



341 



W 



9 







11-84 



533-7 



33-4 



604-1 



33-8 



H 



16 







10-41 



535-4 



33-7 



599-6 



33-9 



W 



10 







11-34 



532-6 



33-4 



603-9 



33-8 



W 



17 







12-89 



5381 



33-5 



5950 



33-6 



W 



11 







12-38 



538-5 



33-4 



598-6 



33-8 



H 



18 







12-58 



5380 



33-3 



593-2 



33-4 



w 



12 







12-85 



537-9 



33-3 



596-2 



33-7 



H 



19 







14-78 



536-5 



331 



593-7 



33-2 



B 



















20 







13-74 



536-4 



32-9 



5931 



331 



B 



13 







25 13-41 



538-0 



33-2 



595-9 



33-7 



H 



21 







13-76 



5370 



32-8 



590-7 



32-8 



H 



14 







13-63 



539-7 



33-2 



5950 



33-6 



H 



22 







14-53 



536-5 



32-7 



587-5 



32-5 



H 



15 







13-79 



5381 



33-2 



593-3 



33-5 



H 



23 







14-78 



537-7 



32-5 



588-1 



32-4 



H 



16 







14-44 



540-5 



331 



584-2 



33-4 



H 



28 







16-92 



539-5 



32-3 



593-6 



32-4 



B 



17 







12-49 



543-8 



330 



578-5 



33-3 



H 



1 







16-57 



533-0 



32-2 



596-6 



32-4 



H 



18 







13-86 



5430 



330 



579-3 



33-2 



H 



2 







15-65 



532-8 



321 



603-5 



32-3 



B 



19 







13-72 



545-3 



32-9 



581-7 



331 



W 



3 







15-38 



536-6 



32-J 



608-7 



32-4 



H 



20 







13-94 



543-6 



32-9 



583-4 



331 



W 



4 







14-70 



539-4 



321 



605-6 



32-5 



H 



21 







14-94 



544-6 



32-9 



582-2 



331 



B 



5 







14-87 



538-3 



321 



605-8 



32-5 



B 



22 







15-61 



5390 



32-8 



584-4 



33-1 



W 



6 







13-59 



540-5 



32-1 



605-2 



32-7 



W 



23 







1601 



538-3 



32-8 



587-1 



331 



W 



7 







13-00 



539-5 



321 



603-3 



32-7 



W 



26 







15-72 



530-2 



32-8 



589-6 



331 



W 



8 







13-86 



538-9 



32-2 



603-8 



32-8 



w 



1 







17-57 



535-8 



32-8 



593-8 



331 



w 



9 







1319 



538-9 



32-3 



602-6 



32-8 



w 



2 







16-90 



538-4 



32-9 



597-2 



33-2 



w 



10 







1317 



534-3 



32-3 



603-7 



32-8 



w 



3 







14-36 



538-4 



330 



603-3 



33-3 



w 



11 







12-43 



538-2 



32-4 



602-9 



32-8 



H 



4 







13-35 



5390 



330 



601-6 



33-4 



w 



12 







11-66 



538-3 



32-5 



602-7 



330 



H 



5 







13-23 



5450 



331 



599-4 



33-6 



w 



















6 







14-46 



539-8 



33-2 



598-3 



33-7 



H 



29 13 



ot 



25 15-72 



5151 



36-2 



680-3 



36-6 



H 



7 







14-98 



541-1 



33-4 



596-2 



33-9 



H 



14 



Of 



24 46-92 



539-9 



36-2 



733-3 



36-6 



H 



8 



of 



11-48 



5290 



33-4 



621-6 



34-0 



H 



15 



of 



25 12-72 



496-4 



361 



603-6 



36-6 



H 



9 



of 



12-48 



535-7 



33-4 



618-3 



34- 1 



H 



16 



ot 



15-91 



492-9 



361 



608-7 



36-6 



H 



10 







14-33 



534-4 



33-7 



608-1 



34-3 



H 



17 



of 



0915 



5160 



361 



6121 



36-6 



H 



11 







13-79 



5360 



33-9 



604-2 



34-5 



B 



18 







10-67 



517-6 



361 



599-6 



36-6 



H 



12 







12-98 



538-1 



33-8 



601-6 



34-5 



B 



19 







11-48 



523-5 



35-9 



618-7 



36-6 



B 



















20 







11-34 



531-5 



35-9 



6330 



36-6 



B 



13 







25 12-46 



537-4 



33-9 



599-7 



34-4 



B 



21 







13-39 



532-7 



35-9 



6328 



36-5 



B 



14 







12-75 



539-1 



33-9 



597-5 



34-4 



B 



22 







13-19 



535-4 



35-8 



623-8 



36-3 



W 



15 







13-63 



540-9 



33-9 



594-2 



34-4 



B 



23 







14-82 



529-7 



35-7 



627-9 



36-2 



w 



16 







12-48 



5390 



33-9 



5921 



34-4 



B 



30 







14-20 



5300 



35-8 



628-7 



36-2 



w 



17 







14-91 



536-5 



33-9 



589-3 



34-4 



B 



1 







19-27 



531-7 



35-9 



628-3 



36-4 



w 



18 







14-46 



545-4 



33-9 



568-8 



34-4 



B 



2 







14-14 



534-9 



35-9 



6320 



36-6 



w 



19 







17-96 



544-2 



33-9 



5700 



34-5 



H 



3 







14-97 



535-1 



361 



635 6 



36-8 



w 



20 







16-05 



543-3 



33-9 



572-3 



34-5 



H 



4 







15-85 



537-7 



36-4 



632-9 



370 



w 



DSCLINATIO] 



*J. Torsion removed, 1 



)ec. 25 d i 



>3 h ,-6J°; 26 d 23 



h , + 5 



5°* ; 29 d i 



23^, 1 



T ; 30 d 3», - 14°. Effect of + 1 



0° of Toi 



sion =i — 



0-'84. 



HlFlLAR. 



Observed 2 m after tl 



le Declin 



ation, £=0-00014 



0. 



Balance. 



Observed 3 m after the Declina 



tion, k= 



0-000008 



5. 



t Extr 



a Obs 



ervations made 





















Dec. 26d Oh- 



-4h. Magnet with short S( 



ale used ii 



i the declinometer. 

















Dec. 26d 22h 



+ Experiments made foi 



the value 



of the torsion coeffic 



ient of 



the declinometer 



thread; effect of 90° of torsion = T; 



)3. 







* Dec. 



•!M .». 



h + The large amount c 



f torsion r 



low found was most 



probab 



y introduced on 



removing the short scale magnet at 



JGd 4h + a 



s the fibres 



then 



became loose. 



Comparison with the un 



iiilar befoi 



e and after removin 



g the t 



orsion gave 



for i 



ts effect — 4'-9, and the effect deduc 



ed from t 



he value c 



f the 



torsion coeffic 



lent = — 5'-2. The observ 



ations fron 



l 26d 4h — 23h have be 



an corn 



;cted by + I 



'•05. 











Dec. 30d 0b- 



-3h. Magnet with short S( 



ale used ii 



i the declinometer. 

















