Abstracts for the Horizontal Force. 



143 



TABLE XII. — The least and greatest Readings of the Bifilar Magnetometer for each Month, from the Daily 



Observations. 





Bifilar Magnetometer. 





Lowest. 



Hiffhest. 



Month. 











Range. 



Gbttingen 

 Mean Time. 



Reading. 



Gottingen 

 Mean Time. 



Reading. 



1841. 



d. h. m. 



Sc. Div. 



d. h. m. 



Sc. Div. 



Sc. Div. 



July 

 August 



19 23 

 4 23 



426-9 



21 5 

 26 5 



501-1 



74-2 

 62-4 



492-4 



554-8 



September 

 October 



3 23 

 6 23 



524-5 



25 5 

 25 2 



875-9 



351-4 

 190-8 



447-8 



638-6 



November 



18 20 



438-0 



18 2 



515-9 



77-9 



1842. 













January 



21 23 



496-0 



25 2 



519-6 



23-6 



February 



1 23 



497-7 



24 2 



530-4 



32-7 



March 



27 23 



490-2 



23 2 



534-5 



44-3 



April 



14 20 



446-8 



15 5 



549-9 



103-1 



May 



17 23 



495-6 



16 5 



555-4 



59-8 



June 



13 23 



490-8 



20 5 



542-8 



52-0 



July 



3 20 



429-6 



4 2 



609-8 



180-2 



August 



5 23 



479-8 



19 5 



574-0 



94-2 



September 



28 23 



492-3 



9 5 



541-2 



48-9 



October 



16 23 



507-4 



20 5 



537-5 



30-1 



November 



21 20 



492-2 



28 5 



540-6 



48-4 



December 



7 5 



520-4 



28 2 



542-4 



22-0 



In the five months of 1841, the range of Horizontal Force from the Daily Observations is about 0-05708. 



The force being below the mean of the month 0-00760 in November, and above the mean of the month 

 0-04948 in September. 



In 1842, the range, in parts of the whole Horizontal force, is 0-02252. The force being below the mean of 

 the month 0-01102 in July, and above the mean of the month 0-01150 in July. 



TABLE XIII. — The least and greatest Readings of the Bifilar Magnetometer on each Term-Day. 



Month. 



Bifilar Magnetometer. 



Range. 



Lowest. 



Highest. 



Gbttingen 

 Mean Time. 



Reading. 



Gbttingen 

 Mean Time. 



Reading. 



1841. 

 July 



August 

 September 



October 



November 



December 



d. h. m. 



21 15 52^^ 



27 22 52J- 



22 23 2i 



20 14 32-1- 

 27 8 42^ 

 22 10 32A^ 



Sc. Div. 

 423-6 



d. h. m. 



22 7 22-»- 



28 6 42i 



23 6 12^ 



20 11 52A 

 27 9 32i 

 23 -9 12A 



Sc. Div. 

 485-3 



Sc. Div. 



61-7 



47-4 

 33-6 



84-8 

 9-0 

 22-3 1 



509-2 

 543-0 



556-6 

 576-6 



441-0 

 496-5 

 492-1 



525-8 

 505-5 

 514-4 



