Tempekatuee Coefficient of the Bifilar Magnet. 
li 
Table 19. — Determinations of the Temperature Coefficient for the Bifilar Magnet, 
from Comparisons of the Daily Observations. 
Period. 
tp / fp + r 
h 
\ tp + r 
9' 
2 A (0 
-2 A (z) 
?' 
-2A(0 
2 A (x) 
9' 
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. Dir. 
13066-8 
24597-2 
3004-0 
53684-3 
36791-6 
Sc. Div. 
2-45 
206 
1-63 
1- 96 
2- 06 
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 
2- 03 
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 
/ = 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 
tp ^ p+r 
tp ^p+i* 
Result 
between 
from all 
comj>ari- 
No. of 
2 A (x) 
the com- 
sons. 
No. of 
-2 A (x) 
2 A (7) 
-2 A (*) 
2a(z) 
-2A(f) 
parisons. 
compari- 
sons. 
2A<7) 
comjjari- 
sons. 
-2 a 
Days. 
Sc. Div. 
Sc. Div. 
Sc. Div. 
Sc. Div. 
Sc. Div. 
1 
5 
142-8 
169-2 
0-8 
8 
311-6 
300-0 
10 
1-0 
2 
4 
229-8 
118-2 
1-9 
8 
656-8 
457-9 
1-4 
1-5 
3 
4 
459-5 
217-7 
21 
8 
1035 1 
619-6 
1-7 
1-8 
4 
6 
689-5 
338-1 
2-0 
6 
1255-5 
650-5 
1-9 
2-0 
5 
6 
811-2 
479-1 
1-7 
7 
1316 7 
812-8 
1-6 
1-7 
6 
6 
976-5 
453-9 
21 
7 
1574 1 
896-7 
1-8 
1-9 
7 
7 
1194-2 
590-7 
2-0 
8 
2097-9 
1198-1 
1-8 
1-8 
8 
5 
949-9 
502-9 
1-9 
7 
1894-9 
1081-4 
1-8 
1-8 
9 
6 
790-7 
413-4 
1-9 
6 
1821-9 
1085-3 
1-7 
1-7 
10 
3 
805-6 
362-9 
2-2 
9 
2030 1 
1116-7 
1-8 
1-9 
11 
4 
864-5 
390-9 
2-2 
8 
1970-3 
997.0 
2-0 
2-0 
12 
5 
1075-5 
588-4 
1-8 
8 
1989-7 
1147-8 
1-7 
1-8 
13 
7 
1324-3 
698-2 
1-9 
6 
1839-5 
1087-9 
1-7 
1-8 
14 
6 
1229-5 
599-7 
2-0 
9 
1940-1 
1171-5 
1-7 
1-8 
For all the 1 
intervals. J 
74 
11543-5 
5923-3 
1-95 
105 
21734-2 
12623-2 
1-72 
1-79 
