38 Mr. Christie on the effects of temperature on 
IV. Table of the decrements in the Azimuths of the Points of 
Equilibrium corresponding to an increment of 1° in the Tempe- 
rature of the Magnets, calculated at intervals of 6' in the Azi- 
muths from 74° to 82°, and of 3' in those from 82° to 86°; the 
distances of the centres of the Magnets from the centre of the 
Needle being 21.52 inches : to be applied to the correction of the 
observed Azimuths when the observed Temperature of the Magnets 
is below the Mean Temperature to which the observations are to 
be reduced. 
<p 
74 ° 
75 ° 
76° 
77 ° 
t 
A (p 
Dif. 
A <p 
Dif. 
A <p 
Dif. 
A <p 
Dif. 
oo 
o6 
12 
i8 
24 
30 
36 
42 
48 
54 
60 
/ 
21.249 
•359 
.471 
.584 
.699 
.815 
•933 
22.052 
.174 
• 297 
.421 
. 1 10 
1 12 
•i »3 
• 115 
. 1 16 
.118 
.119 
.122 
.12*3 
. 124 
i 
22.421 
•547 
.675 
.805 
•937 
23 ^ 07 I 
.207 
•344 
• 484 
.626 
.770 
.126 
. 128 
.130 
. 1 32 
• 134 
• 136 
•137 
. 140 
. 142 
• 144 
23 • 770 
.916 
24.065 
.216 
•369 
•524 
.682 
.842 
25.005 
.170 
•338 
. 146 
• 149 
• 151 
•^53 
•^55 
.158 
. 160 
.163 
.165 
. 168 
25-338 
.508 
.681 
.857 
26.036 
.217 
.401 
• 589 
•779 
.972 
27. 169 
. 170 
•*73 
. 176 
• 179 
.181 
.184 
.188 
. 190 
•*93 
.197 
78° 
79° 
8o° 
8i° 
/ 
A (p 
Dif. 
A <p 
Dif. 
A <p 
Dif. 
A <p 
Dif. 
00 
06 
12 
18 
24 
30 
36 
42 
48 
54 
60 
27.169 
•369 
• 572 
*779 
.990 
28.204 
.422 
• 644 
.870 
29.100 
•334 
.200 
.203 
.207 
.21 1 
.214 
.218 
.222 
.226 
• 230 
•234 
/ 
29^334 
•572 
.815 
30.062 
•313 
.569 
• 830 
31 ‘095 
• 366 
.642 
•923 
• 238 
•243 
•247 
.251 
.256 
.261 
.265 
.271 
.276 
.281 
3^^923 
32.210 
.502 
.800 
33- 104 
! - 4*4 
•730 
34- 053 
•383 
.720 
35- 063 
.287 
.292 
.298 
•304 
• 3*0 
.316 
•323 
•330 
•337 
•343 
35-063 
• 414 
•772 
36.138 
.512 
• 894 
37-285 
. 684 
38.092 
•509 
•936 
• 35 * 
•358 
• 366 
•374 
• 382 
• 39 * 
•399 
.408 
• 4*7 
•427 
