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TEMPERATURE COEFFICIENT OF THE BIFILAR MAGNET. li 
TaBLE 19.—Determinations of the Temperature Coefficient for the Bifilar Magnet, 
from Comparisons of the Daily Observations. 
b > b+r t <i tptr 
Mean of Mean 
ZA @® —3A (2) —iA (0) ZA (2) results. result. 
- 1844. 2 Sc. Div. Se. Dy. Se. Diy, 
{ May 9—May 24 5334-9 | 13066-8 . -¢ 4033-0 2-08 
Z May 29—June 28 11938-2| 24597-2 5 -2| 45966-3 1-89 
4 July 17—July 30 1843-1 3004-0 . 537- 8470-4 ‘ 1-73 
4 Sept. 2—Sept. 25 27322-6| 53684-3 : 2- 1260-8 . 1-99 
4 Nov. 26—Dee. 13 17855-4| 36791-6 3: 3104-5 1-76 
t For all the Periods | 64294-2 |131143-9 36482-7 | 62835-0 1-88 
The mean of the two final results gives 
¢ =1-90 scale divisions; g = 0:000247 
this value of g 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. 
t Z, 
Interval 4 Pg He a < Bee Result 
between from all 
compari- ye Bees : ) the com- 
i 0. 0: 0. 0 5 ' 
sons. compari- |— =A (x) yA () =a TAL || compari- ZA (2) —ZA @ a parisons 
sons. sons. 
Se. Div. = Se. Div. 2 
142-8 169-2 0-8 311-6 300-0 
229-8 118-2 656-8 457-9 
459-5 | 217-7 1035-1 619-6 
689-5 338-1 1255-5 650-5 
811-2 | 479-1 1316-7 812-8 
976-5 1574-1 896-7 
1194-2 2097-9 | 1198-1 
949-9 1894-9 | 1081-4 
790:7 1821-9 | 1085-3 
805-6 2030-1 | 1116-7 
864-5 1970-3 997.0 
1075-5 1989-7 | 1147-8 
1324-3 1839-5 | 1087-9 
1229-5 1940-1 | 1171-5 
11543-5 21734-2 | 12623-2 
Se. Div. 
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