64 



Observations of Magnetic Dip, July 11 — December 30. 1842. 



Gbttingcn 



Dura- 

 tion 





No. 



Mean of Readings. 



A. North 









Mean Time, 



of 



Thermo- 



of 











Minus 



Observed 



Remarks. 





1 







Commencement of 



Obser- 



meter. 



Needle. 



End A. 



End B. 



B. North. 



Dip. 





Observations. 



vation. 







North. 



North. 











d. h. m. 



m. 



o 





o 



/ 







/ 



, 



, 



/ 





July 11 20 45 



80 



59-5 



1 



71 



4000 



71 



1312 



-F 26-88 



71 



26-56 





July 15 7 10 



120 



68-5 



I 



71 



33-38 



71 



14-62 



+ 18-76 



71 



24-00 





July 18 20 40 



120 



600 



1 



71 



37-50 



71 



12-50 



+ 2500 



71 



25-00 





July 22 6 20 



85 



64-3 



1 



71 



33-50 



71 



14-88 



+ 18-62 



71 



24- 19 





July 25 21 10 



70 



62- 1 



2 



71 



15-12 



71 



40-62 



-25-50 



71 



27-87 



Xeedle No, 2 taken by mistake. 



July 29 6 50 



150 



61-7 



1 



71 



41-38 



71 



12-38 



+ 2900 



71 



26-88 





Aug. 1 20 40 



90 



63-0 



1 



71 



45-75 



71 



11-88 



+ 33-87 



71 



28-81 



/This observation is not considered good, though 

 1 much time was bestowed on it. Owing to 



Aug. 5 6 25 



170 



66-5 



2 



71 



24-38 



71 



37-12 



-12-74 



71 



30-75 



J the bad balance of the needle, or the action 

 of the lifter, no reading was considered per- 

 fectly satisfactory. 



Aug. 8 20 20 



75 



63-2 



1 



71 



32-50 



71 



22-75 



+ 9-75 



71 



27-62 





Aug. 15 20 30 



90 



62-5 



1 



71 



28-88 



71 



23-75 



+ 5-13 



71 



26-31 





Aug. 22 20 35 



115 



60-8 



1 



71 



4400 



71 



15-88 



+ 28-12 



71 



26-19 



This observation is scarcely worth recording. 

 No reading could be obtained, after lifting 



Aug. 29 20 30 



105 



630 



1 



71 



27-50 



71 



12-75 



+ 14-75 



71 



20-12 



J and lowering the needle, the same as before. 

 j The greatest care was taken, and the read- 

 ings, in each position, made from 6 to 10 

 I times before one was adopted. 



Sept. 2 6 35 



30 



66-1 



1 



71 



35-62 



71 



18-25 



+ 17-37 



71 



26-94 



j Considered a good observation, though made 

 \ in a comparatively short time. 



Sept. 5 20 20 



50 



58-0 



1 



71 



36-00 



71 



14-50 



+ 21-50 



71 



25-25 





Sept. 9 6 20 



60 



630 



1 



71 



35-00 



71 



1300 



+ 2200 



71 



2400 





Sept. 12 20 25 



40 



54-3 



1 



71 



33-62 



71 



13-25 



+ 20-37 



71 



23-44 





Sept. 16 6 40 



40 



65-9 



1 



71 



3612 



71 



12-38 



+ 23-74 



71 



24-25 





Sept. 19 21 20 



25 



54-0 



1 



71 



37-88 



71 



12- 12 



+ 25-76 



71 



25-00 





Sept. 23 6 10 



35 



590 



1 



71 



36-38 



71 



11-62 



+ 24-76 



71 



2400 





Sept. 26 20 25 



25 



510 



1 



71 



36-38 



71 



15-25 



+ 2113 



71 



25-81 





Sept. 30 6 10 



25 



550 



1 



71 



36-12 



71 



13-00 



+ 23-12 



71 



24-56 





Oct. 3 20 25 



25 



41-8 



1 



71 



35-75 



71 



11-37 



+ 24-38 



71 



23-56 



(^ All the observations since August 29. are con- 



Oct. 7 5 25 



20 



57-3 



' 1 



71 



33-88 



71 



11-62 



+ 22-26 



71 



22.55 



< sidered very good, — none of them were 

 ( hurried. 



Oct. 10 20 20 



25 



53-8 



1 



71 



3300 



71 



11-25 



+ 21-75 



71 



2212 





Oct. 14 5 25 



25 



57-8 



1 



71 



32-75 



71 



1200 



+ 20-75 



71 



22-38 





Oct. 17 20 45 



20 



45-4 



1 



71 



34-88 



71 



9-75 



+ 25-13 



71 



22-31 



fin changing the poles the needle received, bv 



Oct. 24 20 25 



25 



36-8 



1 



71 



34-00 



71 



10-62 



+ 23-38 



71 



22-31 



1 mistake, 10 strokes instead of 8 on each side. 

 ( This observation made by candle light, and is 

 1 not considered so good as the others. 



Oct. 28 5 30 



40 



53-5 



1 



71 



35-38 



71 



13-50 



+ 21-88 



71 



24-44 



Oct. 31 20 30 



25 



55-3 



1 



71 



33-25 



71 



11-88 



+ 21-37 



71 



22-56 





Nov. 4 5 20 



25 



54-2 



1 



71 



32-25 



71 



10-12 



+ 22-13 



71 



21-17 



Observation not quite satisfactory. 

 [Instrument levelled. A considerable change 

 took place in the readings on this occasion, 

 ^ compared with those in the same positions 

 1 previously. Good observation. 

























Nov. 7 21 5 



30 



50-3 



1 



71 



32-38 



71 



9-62 



+ 22-76 



71 



21-00 

























Nov. 11 5 50 



30 



55-8 



1 



71 



30-75 



71 



5-50 



+ 25-25 



71 



18-12 



Good observation. 



Nov. 14 21 



35 



470 



1 



71 



34-62 



71 



8-25 



+ 25-37 



71 



21-44 





Nov. 18 5 25 



40 



54-6 



1 



71 



25-88 



71 



7-12 



+ 18-76 



71 



16-50 



Considered a fair observation. 



Nov. 28 20 35 



40 



540 



1 



71 



32-75 



71 



9-12 



+ 23-63 



71 



20-94 





Dec. 5 23 20 



30 



550 



1 



71 



31-75 



71 



8-75 



+ 23-00 



71 



20-25 



Good observation. 



Dec. 12 20 35 



40 



58-2 



1 



71 



35-62 



71 



10-25 



+ 24-37 



71 



22-94 



Fair observation. 



Dec. 15 5 35 



25 



60-0 



1 



71 



35-75 



71 



9-88 



+ 25-87 



71 



22-81 



Good observation. 



Dec. 19 20 35 



35 



53-5 



1 



71 



31-62 



71 



11-62 



+ 20 00 



71 



21-62 





Dec. 26 20 50 



50 



48-5 



1 



71 



32-50 



71 



7-88 



+ 25-62 



71 



20-19 



Good observation. 



Dec. 30 5 50 



60 



61-7 



1 



71 



29-12 



71 



11-25 



+ 17-87 



71 



2019 



Observed by Mr. Welsh. 



