Tempeeatuee Coefficient of the Bifilae Magnet. li 



Table 19. — Determinations of the Temperature Coefficient for the Bifilar Magnet, 

 from Comparisons of the Daily Observations. 



Period. 



tp / fp+r 



*p \ *p + r 



9 



/ 



2A(0 



-2A(;.) 



9' 



-2A(0 



2A(z) 



?' 



Mean of 



results. 



Mean 

 result. 



1844. 

 May 9 — May 24 

 May 29 — June 28 

 July 17— July 30 

 Sept. 2— Sept. 25 

 Nov. 26— Dec. 13 



5334-9 

 11938-2 



1843-1 

 27322-6 

 17855-4 



Sc. Div. 



13066-8 

 24597-2 

 3004-0 

 53684-3 

 36791-6 



Sc. Div. 



2-45 

 2-06 

 1-63 

 1-96 

 206 



2359-9 



26719-2 



4637-8 



622-1 



2143-7 



Sc. Dv. 



4033-0 

 45966-3 

 8470-4 

 1260-8 

 3104-5 



Sc. Div. 



1-71 

 1-72 

 1-83 

 203 

 1-45 



Sc. Div. 

 208 

 1-89 

 1-73 

 1-99 

 1-76 



Sc.Div. 



2-22 

 1-83 

 1-77 

 1-96 

 1-99 



For all the Periods 



64294-2 



131143-9 



2-04 



36482-7 



62835-0 



1-72 



1-88 



1-92 



The mean of the two final results gives 



g' = 1-90 scale divisions ; q = 0-000247 



this value of q has been adopted, and all the observations in this volume are cor- 

 rected by the equivalent values in scale divisions. 



72. The following Table (similar to Table 15) contains the particulars of the 

 comparisons for intervals of different length, from May 14 till June 28, 1844. 



Table 20. — Results of Comparisons at Different Intervals. 



Interval 





^p / p+r 







tp \^ *p+r 





Result 



between 

 compari- 



















from all 

 the com- 



















sons. 



No. of 

 compari- 

 sons. 



-2A(x) 



2A(0 



-2A(^) 

 2A(0 



No. of 

 compari- 

 sons. 



2A(«) 



-2A(0 



lAix) 



parisons. 



-2A{t) 



Daya. 





Sc. Div. 



o 



Sc. Div. 





Sc, Div. 



o 



Sc. Div. 



Sc. Div. 



1 



5 



142-8 



169-2 







8 



8 



311 



6 



300-0 









1-0 



2 



4 



229 



8 



118-2 



1 



9 



8 



656 



8 



457-9 





4 



1-5 



3 



4 



459 



5 



217-7 



2 



1 



8 



1035 



1 



619-6 





7 



1-8 



4 



6 



689 



5 



338-1 



2 







6 



1255 



5 



650-5 





9 



2-0 



5 



6 



811 



2 



479-1 



1 



7 



7 



1316 



7 



812-8 





6 



1-7 



6 



6 



976 



5 



453-9 



2 



1 



7 



1574 



1 



896-7 





8 



1-9 



7 



7 



1194 



2 



590-7 



2 







8 



2097 



9 



1198-1 





8 



1-8 



8 



5 



949 



9 



502-9 



1 



9 



7 



1894 



9 



1081-4 





8 



1-8 



9 



6 



790 



7 



413-4 



1 



9 



6 



1821 



9 



1085-3 





7 



1-7 



10 



3 



805 



6 



362-9 



2 



2 



9 



2030 



1 



1116-7 





8 



1-9 



11 



4 



864 



5 



390-9 



2 



2 



8 



1970 



3 



997.0 









^•0 



12 



5 



1075 



5 



588-4 



1 



8 



8 



1989 



7 



1147-8 





7 



1-8 



13 



7 



1324 



3 



698-2 



1 



9 



6 



1839 



5 



1087-9 





7 



1-8 



14 



6 



1229 



5 



599-7 



2 







9 



1940 



1 



1171-5 





7 



1-8 



For all thol 

 intervals, J 



74 



11543-5 



5923-3 



1-95 



105 



21734-2 



12623-2 



1-72 



1-79 



