492 
Mr. Ivory on the astronomical refractions. 
TABLE I. continued. 
Distance 
from 
Zenith. 
£0 
Log. S 0 [ 
Difference. 
,° ' 
6 0 
61 
62 
6 3 
6 4 
/ // 
1 40.85 
45 -® 1 
49.44 
S 4- I 7 
59.22 
2.00368 
2.02 I 24 
2.03918 
2.O5754 
2.O7635 
1756 
*794 
1836 
1881 
1932 
1988 
2048 
2116 
2191 
2275 
388 
39 ° 
393 
3 9 6 
39 8 
402 
404 
407 
410 
4 i 3 
4 i 7 
419 
4 2 3 
425 
429 
433 
436 
440 
443 
447 
450 
454 
45 8 
462 
6 5 
66 
67 
68 
69 
2 4.65 
10.48 
16.78 
22.61 
31.04 
2.O9567 
2 -H 555 
2.1 3603 
2.I57I9 
2. 179 IO 
70 00 
10 
zo 
3 ° 
40 
5 ° 
39 - 16 
40.59 
42.04 
43-5 2 
45 - oz 
46 - 53 
2.20185 
2.20573 
2.20963 
2.2I356 
2.21752 
2.22150 
71 00 
10 
20 
3 ° 
40 
5 ° 
48.08 
49.65 
51.25 
52.87 
54-53 
56.21 
2.22552 
2.22956 
2-23363 
2,23773 
2.241 86 
2.24603 
72 00 
10 
20 
3 ° 
40 
5 ° 
57.92 
59.66 
*•43 
3- 2 3 
5.06 
6 -93 
2.25022 
2.25445 
2 25870 
2.26299 
2.26732 
2.27168 
73 00 
10 
20 
3 ° 
40 
5 ° 
8.83 
10.77 
12.74 
14-75 
16.80 
1 8.88 
2.27608 
2.2805 1 
2 28498 
2.28948 
2.29402 
2.29860 
74 °° 
21.01 
2.30322 
Distance 
from 
Zenith. 
Log. £0 1 
Difference. 
dU 
d t 
0 / 
74 00 
10 
20 
3 ° 
40 
5 ° 
/ // 
3 20.01 
23. i 8 
25-39 
27.66 
29.95 
32-3° 
2.3032Z 
2.30789 
2.31230 
2 - 3 1 734 
2.32213 
2.32696 
467 
47 ° 
475 
479 
483 
488 
493 
497 
502 
5°7 
512 
5*7 
523 
528 
533 
53 s 
545 
55 1 
557 
563 
569 
576 
583 
589 
59 6 
603 
611 
618 
6z6 
635 
642 
650 
659 
669 
677 
688 
75 00 
10 
20 
30 
. 4 ° 
5 ° 
34 - 7 o 
37 -i 6 
39- 6 5 
42.21 
44.82 
47.48 
2.33184 
2 33 6 77 
2.34174 
2.34676 
2.35183 
2.35695 
0.009 
76 OO 
IO 
20 
30 
40 
5 ° 
50.21 
53.00 
55- 8 5 
58.76 
4 1.74 
4-79 
2.36212 
2 3 6 735 
2.37263 
2.37796 
2-38334 
2.38879 
0.012 
77 00 
10 
20 
3 ° 
40 
5 ° 
7 - 9 1 
11. 1 1 
* 4-39 
i ?'-74 
21.19 
24.72 
2.39430 
2.39987 
2.40550 
2.4 1 1 19 
2.41695 
2.42278 
0.015 
78 00 
10 
20 
3 ° 
40 
5 ° 
28.33 
32.04 
35 8 4 
39-75 
43.76 
47.88 
2.42867 
243463 
2.44066 
2.44677 
2.45295 
2.4592 1 
0.018 
79 CO 
10 
20 
3 ° 
40 
5 ° 
52.1 2 
56.47 
5 o -94 
5-54 
10.28 
15.16 
2.46556 
2.47198 
2.47848 
2.48507 
2.49176 
2.49853 
0.023 
0.026 
0.030 
80 00 
20.19 
2.50541 
