32 
Mr. Christie on the effects of temperature on 
II. Table of the decrements in the Azimuths of the Points of Equi- 
librium corresponding to an increment of\° in the Temperature 
of the Magnets^ calcidated at intervals oj 6' in the Azimuths from 
77° to 86°; the distances of the centres of the Magnets from the 
centre of the Needle being 21.2 1 inches : to he applied to the cor- 
rection of the observed Azimuths ivhen the observed Temperature 
of the Magnets is below the Mean Temperature to which the oh- 
servations are to be reduced. 
77 ° 
78° 
79 ° 
80° 
81° 
A (p 
Dif. 
A (p 
Dif. 
A p 
Dif. 
A p 
Dif. 
A p 
Dif. 
/ 
oo 
o6 
12 
i8 
24 
3 ° 
36 
42 
48 
54 
60 
/ 
25.675 
. 8/j-8 
26.023 
. 201 
,382 
.565 
.752 
.941 
27*133 
•329 
.528 
•173 
•175 
. 178 
.181 
• 183 
. 187 
. 189 
. 192 
.196 
.199 
/ 
27.528 
•731 
• 937 | 
28. 146 
•359 
•575 
•795 
29.019 
•247 
.480 
.717 
• 203! 
. 206 
. 209 
• 213 
.216 
.220 
.224 
.228 
•233 
•237 
29.717 
.958 
30*203 
•453 
.708 
• 967 
31- 231 
.500 
•774 
32- 054 
•339 
.241 
•245 
. 250 
•255 
•259 
.264 
.269 
•274 
.280 
.285 
32- 339 
.629 
.925 
33- 226 
•534 
•849 
34*169 
.496 
.829 
35-169 
•517 
.290 
. 296 
. 301 
• 308 
•315 
• 320 
•327 
•333 
•340 
.348 
35 *517 
.871 
36.233 
• 603 
.981 
37-367 
.761 
38.164 
•577 
•999 
39*430 
•354 
• 362 
•370 
•378 
• 386 
•394 
•403 
•413 
.422 
• 43 * 
<P 
82° 
83' 
) 
84° 
85° 
A <p 
Dif. 
A p 
Dif. 
A p 
Dif. 
A p 
Dif. 
1 
oc 
06 
12 
iS 
24 
3c 
3 ^ 
42 
48 
54 
6c 
/ 
39 - 43 C 
. 872 
40.32^ 
.786 
.41 .26c 
•745 
» 42. 242 
• 75 ' 
43*273 
.807 
44-355 
•442 
.452 
.462 
•474 
• 4^5 
•497 
.509 
. C 22 
•534 
.548 
/ 
44-355 
.917 
45*493 
46.08^ 
.691 
47 - 3'3 
• 952 
48.609 
49.28^ 
•977 
50.69c 
.562 
.576 
.591 
.607 
.622 
.639 
.657 
.675 
•693 
.713 
f 
50.690 
51-423 
52.178 
52.954 
53*753 
54-575 
55.422 
56*295 
57-^94 
58.121 
59-077 
•733 
•755 
• 776 
•799 
.822 
.847 
•873 
•899 
• 927 
.956 
59.077 
60.062 
61 .079 
62.128 
63.212 
64*332 
65 ,489 
66,684 
67.920 
69.199 
70.522 
•985 
1.017 
1 .049 
1 .084 
1.120 
1.157 
1.195 
1 .236 
1.279 
••323 
