Factors for the correction of the mean Refraction. 
347 
on Atmospherical Refractioji 
Barometer Fahrenheit's Thermometer. 
in inches. 
0 
Within. 
Without. 
0 
Within. 
Witiiout. 
y 
— 
+ 
+ 
+ 
— 
— 
28.60 
,0350 
29.60 
,0000 
21.5 
,0632 
JO470 
49.0 
,0000 
,0080 
62 
,0342 
62 
,0007 
22.0 
,0621 
,0460 
49-5 
,0011 
,0090 
64 
>0335 
64 
,0014 
22.5 
,0609 
0 
0 
50.0 
,0022 
,0100 
66 
,0328 
66 
,0020 
23.0 
,0598 
,0440 
50 5 
>0033 
,0110 
68 
>0321 
68 
,0027 
23-5 
,0586 
,0430 
5 1 .O 
,0044 
,0120 
00 
0 
,0314 
29.7c. 
,0034 
24.0 
>0575 
,0420 
51-5 
,0055 
,0130 
72 
,0306 
72 
,0041 
24.5 
,0563 
,0410 
52.0 
,0066 
,0140 
74 
,0299 
74 
,0047 
25.0 
,0552 
,0400 
52.5 
,0077 
>0150 
76 
,0292 
76 
,0054 
25.5 
,0340 
,03Q0 
53.0 
,0088 
,0160 
78 
,0285 
78 
,006 1 
26 0 
,0329 
,0380 
53-5 
,0099 
,0170 
28.80 
,0278 
29.8c 
,0068 
26.5 
.05^7 
,0370 
540 
,0110 
•,0180 ■ 
82 
,0271 
82 
,0074 
27.0 
,0506 
,0360 
54 5 
,0121 
,0190 
84 
,0264 
84 
,008 1 
27-5 
,0494 
,0350 
55.0 
,0132 
,0200 
86 
,0256 
86 
,0088 
28,0 
,0483 
,0340 
55-5 
,0143 
,02 10 
88 
0249 
88 
,0095 
28.5 
,0471 
>0330 
56.0 
,0154 
,0220 
28.90 
,0242 
29.90 
,0101 
29.0 
,0460 
,0320 
56.5 
,0165 
,0230 
92 
,0235 
92 
,0108 
29.5 
,0448 
,0310 
57.0 
,0176 
,0240 
94 
,0228 
94 
,0115 
30.0 
>0437 
,0300 
57-5 
,0187 
,0250 
96 
,0221 
96 
,0122 
30.5 
,042 5 
,0290 
58.0 
,0198 
,0260 
98 
,0214 
98 
,0128 
31.0 
,0414 
,0280 
58.5 
,0209 
,0270 
29.00 
,0207 
30.00 
>o'35 
31*5 
,0402 
,0270 
59.0 
,0220 
,0280 
02 
,0200 
02 
,0142 
32 0 
,0391 
,0260 
59-5 
,0231 
,0290 
Oi 
,0193 
04 
,0149 
32.5 
>0379 
,0250 
60.0 
,0242 
,0300 
06 
,0i86 
06 
33 0 
,0368 
,0240 
60.5 
,0253 
,0310 
ob 
,0179 
08 
,0162 
33-5 
,0356 
,0230 
61.0 
,0264 
,0320 
29.IC 
,0172 
30.10 
,0169 
34-0 
>03*45 
,0220 
61.5 
,0275 
>0330 
12 
,0165 
12 
.0176 
34-5 
>0333 
,0210 
62 0 
,0286 
,0340 
li 
,01 58 
14 
,0182 
35-0 
,0322 
,0200 
62.5 
,0297 
,0350 
16 
,0151 
16 
,0189 
35-5 
,0310 
,0190 
63 0 
,0308 
,0360 
18 
,0144 
18 
.0196 
36.0 
,0299 
,0180 
63-5 
,0319 
,0370 
29.2c 
,0137 
30.20 
.020^ 
36 5 
0 
N 
00 
>0170 
64 0 
>0330 
,0380 
22 
,0130 
22 
,021c 
37 -^ 
,027(3 
,0160 
64.5 
,0341 
,0390 
24 
,0123 
24 
,0216 
37-5 
,0264 
,0150 
65.0 
,0352 
,0400 
zb 
,0116 
26 
,0223 
38.0 
,0253 
,0140 
65.5 
>0363 
,0410 
28 
,0109 
28 
.023c 
38.5 
,0241 
,0130 
66. c 
>0374 
,0420 
29.3c 
,0502 
30 3 ^= 
,0237 
39-0 
,0230 
,0120 
66.5 
,0385 
,0430 
32 
,0096 
32 
,0243 
39 5 
,0218 
,0! 10 
67.0 
,0396 
>0440 
34 
,0089 
34 
,025c 
40.0 
,0207 
,0100 
67.5 
,0407 
,0450 
36 
,0082 
36 
,025~ 
40.5 
,0195 
,0090 
68 0 
,0418 
,0460 
38 
,0075 
38 
,026.; 
41.0 
,0184 
,0080 
68.5 
,0429 
JO47O 
29 4c 
,0068 
30.40 
,027V 
41.3 
,0172 
,0070 
69.0 
,0440 
,0480 
42 
,0061 
42 
,0277 
42 0 
,0161 
,0060 
69,5 
,0451 
,0490 
44 
,oo 5 h 
44 
,0284 
42.5 
,0149 
,0050 
70.0 
,0462 
,0500 
46 
,0048 
4O 
,0291 
43-0 
,0138 
,0040 
70.5 
>0473 
,0510 
48 
,0041 
48 
,0297 
43-5 
,0126 
,0030 
75.0 
,0484 
,0520 
29.50 
0034 
30.50 
,030^ 
44.0 
,0115 
,0020 
7»-5 
>0495 
,0530 
52 
,o<-27 
52 
,0311 
44-5 
,0103 
,0010 
72.0 
,0506 
,0540 
54 
,0020 
54 
,0318 
45.0 
,0092 
— 
72.5 
>05 ‘7 
,0550 
56 
,0014 
56 
,0324 
45-5 
,0080 
,0010 
73-0 
,0528 
,0560 
5S 
,0007 
58 
,0331 
46.0 
,0069 
,0020 
73-5 
>0539 
,0570 
46.5 
,0057 
,0030 
74 -c 
,0550 
,0580 
47.0 
,0046 
,0040 
74-5 
,0561 
,0590 
47-5 
,0034 
0 
0 
0 
*\ 
75.0 
,0572 
,0600 
48. c 
,0023 
,0060 
75 5 
,0583 
,0610 
% 
48.5 
,001 I 
.0070 
76. c 
>0594 
,0620 
