oi©ao^C)c«i^«3N)HOicac-5acTi^WN)MO(oco-^o)Cni^oaN)H ®o 
44 On the Diminution of the Obliquity of the Ecliptic . 
TABLE I. TABLE II. 
Years. 
0 
0.00 
1 
0.43 
2 
0.85 
3 
1.28 
4 
1.71 
5 
2.13 
6 
2.56 
7 
2.99 
8 
3.41 
9 
3.84 
10 
4.27 
20 
8.54 
30 
12.80 
40 
17.07 
50 
21.34 
60 
25.61 
70 
29.87 
80 
34.14 
90 
38.42 
100 
42.69 
// 
U 
// 
r l — o.4i 
r i — 0.08 
#“v 
r 1 4- 0.04 
£ 
t-i 
7 — 0.38 
7—0.17 
d> 
7 4- 0.09 
§< 
13 — 0.32 
< 
13 — 0.27 
B < 
j 13 + 0.12 
§ 
19—0.26 
19—0.35 
19 + 0.13 
*-s 
1 25 — 0.17 
L 25 — 0.43 
o> 
m 
25 + 0.13 
CN 
r 1 — 0.09 
r 1 — 0.51 
r 1 4- 0.10 
b 
7 — 0.00 
rv 
0) 
7 — 0.57 
r* 
u 
0) 
7 + 0.06 
£ < 
13 + 0.08 
§ < 
13 — 0.61 
-a ^ 
O n 
13 + 0.01 
19 4- 0.16 
19—0.63 
o 
19 — 0.07 
L 25 + 0.23 
L 25 — 0.63 
25 — 0.15 
r 1 4 0.27 
- 1 _ 0.64 
u 
- 1 — 0.26 
-e 
7 4- 0.31 
£ ' 
7 — 0.59 
o 
£> ! 
7 — 0.36 
c3 < 
13 4- 0.34 
13 — 0.55 
s 1 
13 — 0.45 
§ 
19 4- 0.35 
19—0.49 
1 1 
19 — 0.55 
L25 4- 0.33 
l 25 — 0.43 
£ 
.25 — 0.63 
r 1+ 0.30 
r 1 — 0.33 
CN 
- 1 — 0.71 
-T 1 
7 + 0.25 
(A 
7—0.25 
D 
rQ 
7 — 0.77 
■g,i 
13 4- 0.18 
tf) i 
13—0.17 
s < 
13 — 0.81 
< 
19 + 0.10 
<1 
19 — 0.10 
$ 
19 — 0.84 
125 4- 0.02 
25 — 0.03 
Q 
.25 — 0.84 
TAB. III. — Lonar Nutation. — Arg. Long. Moon’s Node. 
O. 
VI. 
I. VII. 
II. VIII. 
— 
4- — 
4 — 
u 
/ / 
// 
o 
9.64 
8.35 
4.82 
30 
9.64 
8.27 
4.62 
29 
9.64 
8.18 
4.53 
28 
9.63 
8.09 
4.38 
27 
9.62 
8.00 
4.23 
26 
9.61 
7.90 
4.08 
25 
9.59 
7.81 
3.92 
24 
9.57 
7.71 
3.77 
23 
9.55 
7.60 
3,61 
22 
9.53 
7.49 
3.46 
21 
9.50 
7.39 
3.30 
20 
9.47 
7.28 
3.15 
19 
9.44 
7.17 
2.99 
18 
9.40 
7.06 
2.83 
17 
9.36 
6.94 
2.67 
16 
9.31 
6.82 
2.50 
15 
9.27 
6.70 
2.33 
14 
9.22 
6.58 
2.17 
13 
9.17 
6,46 
2.01 
12 
9.12 
6.33 
1.85 
11 
9.07 
6.20 
1.68 
10 
9.01 
6.07 
1.52 
9 
8.95 
5.94 
1.35 
8 
8.88 
5.81 
1.18 
7 
8.81 
5.67 
1.01 
6 
8.74 
5.53 
0.84 
5 
8.67 
• 5.40 
0.67 
4 
8.60 
5.25 
0.50 
3 
8.52 
5.11 
0.33 
2 
8.44 
4.97 
0.17 
1 
8.35 
4.82 
0.00 
O 
XI. 
IV. X. 
III. IX. 
4* 
«— + 
— + 
To find the True Obliquity from these 
Tables, subtract from 23° 27' 57". 00, 
the number answering to the number of 
years after 1800 ; and then add or sub- 
tract, according to its sign, the numbers 
from the two last Tables. 
Example. 
Required to find the Apparent Obli- 
quity April 12. 1821 ? 
Table 1. 20 years, 
— 1 year, 
Table 2. April 12. 
Table S. Moon’s Node, 
11 s 11° 41', 
o / // 
23 27 57.00 
— 8.54 
— 0,43 
4- 0.19 
+ 9.15 
The Apparent Obliquity, 23 27 57.37 
R. T. 
Belfast 
April 12. 1821 
121 . } 
