162 



Observations of Magnetic Dip, January 3 — July 30, 1844. 



Gottingen 

 Mean Time, 



Middle of 

 Observation. 



d. h. m. 



Jan. 3 2 50 



Jan. 6 4 40 



Jan. 8 22 25 



Jan. 9 20 



Jan. 12 4 



Jan. 16 1 40 



Jan. 30 30 



Feb. 2 4 45 



Feb. 5 23 30 



Feb. 9 3 50 



Feb. 13 4 30 



Feb. 16 4 30 



Feb. 20 20 



Feb. 27 4 45 



Mar. 1 4 50 



Mar. 5 23 50 



Mar. 11 23 20 



Mar. 19 15 



Mar. 22 4 25 



Mar. 26 1 25 



Apr. 2 15 



Apr. 4 4 35 



Apr. 8 23 20 



Apr. 12 4 50 



Apr. 22 23 50 



July 21 22 10 



July 30 1 20 



July 30 2 5 



Dura- 

 tion. 



55 

 35 



45 



55 

 55 

 60 

 55 

 50 



90 

 55 

 50 

 50 

 65 

 55 

 50 

 55 

 45 

 45 

 80 

 40 

 40 



Needle. 



Num- 

 ber. 



2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 

 1 



Tem- 

 pera- 

 ture. 



42 



45 



34 



45 



38 



46 



38 



41 



46 



42 



49 



43 



47 



49 



48 



45 



58 



51 



65 



54 



46 



58 



49 



59 



70 



58 



58 



End 

 dip- 

 ping. 



{I 



B 



A 

 A 

 B 

 B 



A 



A 



IB 



{I 



{£ 



{I 



{b 



B 

 A 

 A 

 B 

 B 

 A 

 A 

 B 

 B 

 A 

 A 

 B 

 B 

 A 

 A 

 B 

 B 

 A 

 A 

 B 

 B 

 A 

 A 

 B 



Face of Circle E. 



Mark on Needle 

 E. W. 



72 

 71 



71 

 72 

 72 

 70 

 72 

 70 

 70 

 72 

 72 

 70 



9-0 

 5-5 

 4-0 

 10-5 

 7-5 

 10 

 10-0 

 8-0 

 15-0 

 3-5 

 4-5 

 25-5 

 70 45-5f 

 72 10 

 30 

 21-5 

 22-5 

 90 

 00 

 220 

 330 

 20 

 190 

 25 

 30 

 59-0 

 20 

 52-5 

 47-5 

 29-0 

 47-0 

 13-5 

 8-0 

 37-5 

 47-0 

 57-0 

 0-5 

 38-5 

 2-5 

 8-0 

 60 

 300 

 33-5 

 20 

 58-0 

 45-5 

 530 

 52-0 

 49-5 

 6-5 

 9-5 

 59-5 

 5-5 

 59-5 

 35-0 

 370 



72 

 70 

 70 

 72 

 72 

 70 

 70 

 72 

 72 

 71 

 71 

 71 

 72 

 70 

 70 

 72 

 72 

 71 

 71 

 72 

 72 

 70 

 71 

 72 

 73 

 71 

 71 

 72 

 72 

 71 

 70 

 72 

 72 

 70 

 70 

 73 

 73 

 70 

 71 

 71 

 74 

 68 



71 

 72 

 72 

 71 

 71 



26-0 

 20 

 3-5 

 26-5 

 22-5 

 72 400 

 71 15-5 

 310 

 23-5 

 20-0 

 200 

 30-5 

 37-5 

 25-5 

 21-5 

 46-0 

 50-0 

 250 

 23-5 

 33-5 

 39-0 

 11-5 

 70 

 5-0 

 17-0 

 28-5 

 230 

 19-5 

 20-5 

 170 



72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 71 

 72 

 72 

 71 

 70 

 72 



16-5 

 13-5 

 13-5 



7-0 



50 

 20-5 

 190 

 120 



7-0 

 10-5 

 15-5 

 17-5 

 240 

 21-5 

 17-0 

 15-5 

 105 

 35-5 

 34-5 



8-0 

 11-5 

 23-5 

 27-5 

 24-0 

 33-5 

 57-0 



Face of Circle W. 



Mark on Needle 

 E. W. 



71 



70 

 70 

 71 

 71 

 69 

 72 

 69 

 70 

 71 

 72 

 70 

 69 

 71 

 71 



44-0 

 41-5 

 380 

 47-0 

 50-5 

 31-5 



30 

 57-0 



7-0 

 57-0 



0-5 



50 

 550 

 490 

 55-5/ 

 69 36-0 

 69 29-0 

 50-5 

 51-5 

 520 

 46-0 

 57-0 

 590 

 41-5 

 250 

 47-0 

 52-5 

 19-0 

 220 

 320 

 17-5 

 36-5 

 28-0 

 220 

 23-5 

 21-5 

 19-5 

 20-5 

 31-5 

 350 

 33-5 



9-5 



9-5 

 240 

 330 

 25-5 

 23-0 

 49-0 

 43-0 

 220 

 200 

 22-0 



5-5 

 45-0 

 550 

 26-0 



71 

 71 

 69 

 69 

 71 

 71 

 70 

 70 

 71 

 71 

 70 

 70 

 72 

 72 

 70 

 70 

 72 

 72 

 70 

 70 

 72 

 72 

 70 

 70 

 72 

 72 

 70 

 70 

 72 

 72 

 69 

 69 

 72 

 72 

 70 

 70 

 71 

 73 

 68 



71 

 71 

 71 

 71 

 71 

 71 

 70 

 72 

 71 

 71 

 71 

 71 

 71 

 71 

 71 

 72 

 71 

 71 

 71 

 72 

 71 

 71 

 70 

 71 

 71 



30 



26-0 



29-5 



2-5 



00 



56-0 



530 



4-0 



56-0 



120 



8-0 



520 



450 



190 



60 



6-5 



50-5 



3-5 



8-5 



20 



54-5 



2-0 



58-5 



39-Of 



34-5 



70 59-0 



71 3-0 

 42-5 



2-5 

 42-5 

 41-0 

 28-0 

 29-0 

 28-0 

 48-5 

 490 

 430 

 34-5 

 34-5 

 26-0 

 55-Of 

 40-5 

 42-0 

 350 

 36-0 

 40-5 

 220 

 350 

 330 

 14-5 

 30-0 

 54-5 

 37-0 

 570 

 55-0 

 23-0 



71 

 72 



70 

 70 

 71 

 71 

 70 

 70 

 71 

 71 

 70 

 70 

 71 

 71 

 70 

 70 

 71 

 71 

 70 

 70 

 71 

 71 

 70 

 70 

 71 

 71 

 70 

 69 

 72 



Mean. 



71 35 

 71 18 

 71 18. 

 71 36 

 71 35 

 71 2. 

 71 35 

 71 10 

 71 10 

 71 38 

 71 38 

 71 13 

 71 15 

 71 38 



71 

 71 

 71 



12) 

 12/ 

 37) 

 00/ 

 37} 

 12/ 



71 36 

 71 12 

 71 8 

 71 37 

 71 35 

 71 12 

 71 13 

 71 33 



71 

 71 

 71 



71 33 



71 35 



71 18 



71 23 



71 45 



71 45 



22 

 19 



38 



71 46 

 71 22 

 71 20 

 71 41 

 71 48- 

 71 19- 



25 



25 



75 



62 



50 



50 



00 



00 



bS 



37 



12 



12 



88 



00 



88/ 



38j 



12) 



38J 



12) 



12/ 



50) 



88/ 



62 



62 



00 



00 



50 



38 



Observed 

 Dip. 



27 



39 



71 42 

 71 20 

 71 21 

 71 46 

 71 42 

 71 12 

 71 10 

 71 42 

 71 47 

 71 24 

 71 18 



71 31 



72 14 

 70 35 



50 



38 



25 



63 



00) 



75/ 



13 



87 



00 



75 



75 



87 



■87) 



38/ 



62 



75 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



71 



27-12* 



27-69* 



18-62f 



22-68 



24-24 



25-75 



27-18 



24-50 



21-50f 



24-12 



2312 



28-94 



26-63* 



26-75* 



34-12f 



34-19* 



29-12* 



34-00 



30-94* 



34-38* 



33-44 



31-44 



33-87 



27-50 



26-37* 



36-31 



25-12 



25-18 



* Observations considered good. f Observations considered bad or doubtful. 



Jan. 3d. Good observation. All the readings verified, as usual, by repeatedly lifting and lowering the needle. 

 Jan. 9d. In changing the poles the needle lay very unsteadily on the block, so that the axle may have been injured. 



Jan. 10d. After the needle is lowered by the Ys it often leaps one or two degrees, producing a large arc of vibration, but without altering the mean position. 

 Jan. 17<l. Discovered a piece of the velvet loose at the bottom of the door of the inclinometer, which had wedged the door too tightly when shut, and thus 

 probably affected the level of the instrument. 



Jan. 30<1. Several bad readings, especially under A dipping. (instrument. 

 Feb. 6d. Observation not satisfactory ; in some of the readings the needle does not move freely, owing, probably, to the great deposition of moisture on the 

 Feb. 16d. Observation fair, excepting (t), which is considered within 5' of the truth. 

 April 4d. Levelled the instrument, needle vibrating ; fair observation. . 



