Absteacts foe the Magnetic Declination. 



139 



TABLE VI. — The Extreme Readings of the Declinometer for each of the Term-Days. 







North End of Magnet Farthest 







Month. 



E 





W. 



Range. 



Gbttingen 

 Mean Time. 



Declination. 



Gbttingen 

 Mean Time. 



Declination. 



1841. 



d. h. m. 



. ' 



d. h. m. 



o . 



' 



July 



21 18 



25 24-95 



21 16 



25 46-83 



21-88 



August 



27 11 10 



25 21-18 



28 1 35 



25 48-25 



27-07 



September 



22 10 25 



25 2617 



23 1 25 



25 41-67 



15-50 



October 



21 6 40 



24 56-85 



21 1 20 



25 39-25 



42-40 



November 



27 8 50 



25 24-43 



27 1 15 



25 33-30 



8-87 



December 



23 9 10 



25 24-82 



23 10 



25 35-53 



10-71 



1842. 













January 



19 10 36 



25 23-17 



20 4 18 



25 38-89 



15-72 



February 



25 10 



25 22-42 



26 2 24 



25 37-02 



14-60 



March 



24 8 36 



25 9-38 



23 13 12 



25 40-38 



31-00 



April 



20 15 24 



25 22-38 



20 16 12 



25 46-82 



24-44 



May 



27 21 



25 25-02 



28 2 18 



25 36-23 



11-21 



June 



23 8 6 



25 16-95 



23 1 



25 37-23 



20-28 



July 



20 10 



25 16-77 



21 1 42 



25 32-87 



16-10 



August 



26 12 42 



25 17-47 



26 11 42 



25 33-13 



16-66 



September 



22 7 30 



25 11-10 



22 1 12 



25 41-73 



30-63 



October 



19 10 48 



25 16-26 



19 13 18 



25 38-23 



21-97 



November 



25 10 



25 26-22 



26 1 42 



25 31-70 



5-48 



December 



20 10 



25 22-40 



21 36 



25 30-93 



8-53 



The range of the six Term-days of 1841 is •51''4 ; the least Westerly Declination occurring in October, being 

 33" 3 below the mean of the month ; the greatest in August, being 12'"4 above the mean of the month. 



The range of the twelve terms in 1842 is 37''4 ; the least Declination occurring in March, being 20'" 1 below 

 the mean of the month ; the greatest in April, being 13'-4 above the mean of the month. 



TABLE VII. — The Extreme Readings of the Declinometer during Extra Observations for each Month in which 



Extra Observations were made. 









North End of Magnet Farthest 













E. 







W 







Month. 















Range. 



Gbttingen. 

 Mean Time. 



Declination. 



Gbttingen 

 Mean Time. 



Declination. 



1841. 



d. h. m. 



s. 



/ 



d. h. m. 



s. 



o 





August 



20 22 40 







25 35-28 



20 23 20 







25 38-30 



3-02 



September 



25 5 35 



18 



25 21-07 



25 6 20 



18 



27 1-56 



100-49 



1842. 

















May 



24 8 







25 30-45 



16 5 







25 49-71 



19-26 



July 



1 20 42 







25 6-55 



2 11 48 







25 50-28 



43-73 



August 



6 5 30 







25 21-65 



19 5 48 







25 34-88 



13-23 



September 



2 8 24 







24 54-28 



21 2 







25 37-30 



43-02 



October 



17 5 24 







25 5-08 



18 3 4 







25 32-87 



27-79 



November 



3 8 







25 17-57 



21 20 48 







25 40-98 



23-41 



December 



9 5 54 







25 9-58 



9 8 24 







25 36-22 



26-64 



The range of all the disturbances observed in 1842 is 56'. 



The least Westerly Dechnation occurs in Septeiuber, being 33'*5 below the mean of the month ; the greatest 

 in July, being 21'-7 above the mean of the month. 



The range of Dechnation from all the observations of 1^41 is 2° 4'-7. The least Westerly Declination oc- 

 curring in the October term 1841, being 33'-3 below the mean of the month ; the greatest during the disturbance 

 September 25. 1841, being 1° 29'-3 above the mean of the month. 



The range of all the observations in 1842 is 58'. The least Westerly Declination occurring during the dis- 

 turbance September 2. 1842, being 3 3'- 5 below the mean of the month ; the greatest in the Daily Observation, 

 April 14'i 20** 1842, being 18'-9 above the mean of the month. 



