Abstracts for Disturbances. 



153 



TABLE XXIII. — continued. 



Gottingen 

 Mean Time. 



Kango. 



Gottingen 

 Mean Time. 



Kange. 



Declino- 

 meter. 



Bifilar 

 Magneto- 

 meter. 



Balance 



Magneto- 

 meter. 



Declino- 

 meter. 



Bifilar 

 Magneto- 

 meter. 



Balance 



Magneto- 

 meter. 



July 



1842. 



d. h. d. h. 



1 20— 2 5 



11-62 



Sc. Div. 



77-5 



Mi<-. Div. 



193-9 



1842. 



d. h. d. h. 



Oct. 12 20—13 5 



10-15 



Sc. Div. 

 0-8 



Mic. Dir. 



96-5 





3 20— 45 



9-37 



180-0 



548-2 



13 20—14 5 



7-45 



8-9 



89-5 





8 20— 9 5 



5-77 



37-0 



180-7 



16 20—17 5 



15-84 



28-1 



44-6 





22 20—23 5 



7-57 



421 



79-3 



18 20—19 5 



11-46 



13-5 



127-1 



Aug. 



20— 1 5 



10-48 



38-9 



98-8 



Nov. 1 20— 2 5 



7-60 



5-6 



50-7 





5 20— 6 5 



10-75 



33-4 



181-7 



9 20—10 5 



12-35 



24-4 



115-7 





17 20—18 5 



7-85 



35-3 



106-9 



10 20—11 



10-20 



13-9 



90-2 





18 20—19 5 



7-48 



78-0 



411-2 



20 20—21 5 



3-09 



16-7 



53-7 





23 20—24 5 



14-77 



11-4 



82-8 



21 20—22 5 



7-79 



35-4 



205-1 



Sept. 



1 20— 2 5 



8-55 



18-2 



106-2 



22 20—23 5 



5-26 



28-5 



60-1 





8 20— 9 5 



11-21 



36-5 



69-9 



Dec. 5 20— 6 5 



5-30 



11-4 



16-4 





12 20—13 5 



16-25 



38-7 



26-9 



7 20— 8 5 



9-44 



7-7 



24-1 





16 20—17 5 



7-13 



13-3 



96-0 



8 20— 9 5 



209 



12-4 



58-7 





28 20—29 5 



12-83 



40-5 



115-8 



29 20—30 5 



7-39 



14-7 



38-1 



Oct. 



7 20— 8 5 



1 



10-68 



26-9 



25-6 











The above Table has been formed thus ; if a, b, and c, be the mean range for three successive months, as 

 given in Tables I., IX., and XVI., those days in the month whose range is 6, have been considered days of dis- 



/"/ -1— 2 /) —1— 



turbance if the range of the four daily observations, for any of the three Magnetometers, exceeds ^ • When 



there is not a month preceding or succeeding, the sum b + c or a +b has been used. 



In many of the days only one or two of the instruments shew ranges exceeding the test. In the formation of 

 Tables II., X., and XVIII., those days only have been rejected in which the range for the instrument to which 

 the Table belongs has exceeded the test. All the ranges of the two force Magnetometers given above have been 

 corrected by the new values of q. 



The following Table contains several days in which the irregularity is well marked, but which are not in- 

 cluded in the above. 



TABLE XXIV. — Days of Marked Irregularity not determined by the Rule used in the formation of Table XXIII. 



■^ 1841. 



1842. 



d. d. 



Atigust 15—16 



September 18 — 19 



23—24 



d. d. 



November 8 — 9 



9—10 



10—11 



d. d. 



February 1 — 2 

 April 0— 1 

 April 25—26 



29—30 



October 6— 7 



12—13 



11—12 

 12—13 

 22—23 



July 4— 5 

 August 4 — 5 

 November 1 — 2 



MAG. AND MET. DBS. VOL. I. 



2a 



