AT THE OBSERVATORY AT PARAMATTA 
143 
2 a Centauri. (Ann. Var. — 15".970.) — (Continued.) 
Superior Culmination. 
1828. 
Barom. 
Therm. 
Microscopes. 
i. 
II. 
in. 
IV. 
inches. 
/ 
it 
i ii 
/ it 
/ // 
Oct. 7 
30.16 
64.5 
30 
7 35.4 
7 38 
7 43.3 
7 41.0 
19 
29.90 
73 
99 
99 
32.5 
» 34.7 
» 43.2 
» 37.0 
29 
29.76 
86 
99 
99 
35.1 
„ 40.0 
» 43.7 
» 44.2 
30 
30.04 
73 
99 
99 
29.0 
„ 39.5 
» 51.0 
„ 44.2 
Nov. 3 
29.94 
75 
99 
99 
37.1 
„ 36.5 
» 48.5 
„ 39.3 
7 
29.84 
77 
99 
99 
35.7 
„ 37.8 
„ 41.0 
» 43.2 
9 
29.79 
58 
99 
99 
34.0 
„ 39.0 
,» 45 
» 40 
11 
29.54 
80 
99 
99 
37.5 
„ 40.8 
„ 47.0 
„ 45 
12 
29.57 
76.7 
99 
99 
40.0 
„ 40.0 
» 42.0 
„ 42.3 
14 
29.52 
80 
99 
99 
37.0 
„ 42.6 
„ 45.8 
„ 45.5 
16 
29.50 
77.5 
99 
99 
40.3 
„ 38.0 
„ 44.0 
» 45.0 
23 
29.77 
70.5 
99 
99 
38.6 
„ 40.3 
» 51.0 
„ 46.5 
25 
29.79 
82 
99 
99 
36.7 
„ 33.0 
» 40.0 
„ 39.3 
26 
29.93 
80 
99 
99 
33.5 
» 37.7 
„ 43 
„ 38.0 
27 
29.98 
80.2 
99 
99 
30.8 
„ 37.5 
» 42 
„ 39.0 
Dec. 5 
30.04 
82 
99 
99 
40.8 
„ 39.5 
„ 51 
„ 43.0 
14 
29.94 
82.5 
99 
99 
40.7 
„ 43 
» 51 
S 49.7 
15 
29.83 
95 
99 
99 
37.0 
„ 43.7 
» 45 
„ 48.0 
23 
29.69 
90.5 
99 
99 
44.0 
„ 44.5 
„ 52.0 
„ 50.0 
26 
30.11 
72.5 
99 
99 
42 
» 46 
„ 43 
» 45 
Nov. 18 
... Mean ... 
30 
7 36.9 
7 39.6 
7 45.6 
7 43.3 
Refract, and Reduct- 
26.14 
26.2 
26.1 
26.2 
Superior Culminat. 
30 
7 
10.8 
7 13.4 
7 19.5 
7 17.1 
Inferior Culminat... 
330 21 
23.0 
21 23.3 
21 23.5 
21 19.7 
Half Diff. S. P. 
D. 
29 52 53.9 
52 55.1 
52 58.0 
52 58.7 
Inferior Culmination. 
1828. 
Barom. 
| 
Microscopes. 
H 
i. 
II. 
III. 
IV. 
Nov. 4 
inches. 
29.90 
52.5 
330 32 46.0 
/ // 
32 47.0 
t it 
32 45.3 
/ it 
32 47 
17 
29.50 
60 
99 
32 35.0 
32 32.0 
32 33.5 
32 25.0 
23 
29.49 
71 
99 
32 2.0 
32 0.0 
32 5.0 
32 1.0 
Dec. 5 
30.07 
66 
99 
32 32.0 
32 32.0 
32 28.0 
32 25.0 
13 
30.08 
65 
99 
32 27.0 
32 27.7 
32 31.0 
32 23.0 
14 
30.02 
65 
99 
32 22.0 
32 27.0 
32 25.3 
32 20.0 
15 
29.80 
79 
99 
31 46.2 
31 47.0 
31 47.0 
31 47.0 
Nov. 30 
... Mean ... 
330 32 21.5 
32 21.8 
32 22.1 
32 18.3 
Refract, and Reduct. 
10 58.5 
10 58.5 
10 58.6 
10 58.6 
330 21 23.0 
21 23.3 
21 23.5 
21 19.7 
Mean Inside Temperature 73°. 
Mean of 4 Microscopes 29° 52' 56".41 by 27 Observ. 
Mean S. P. D. of 2 a Centauri, Jan. 1, 1828 29° 52' 57 r, .205 by 94 Obsesv. 
f 3 Centauri. (Ann. Var. — 17".69.) 
Superior Culmination. 
1822. 
Barom. 
a 
Microscopes. 
i. 
II. 
III. 
IV. 
Nov. 24 
inches. 
o 
t 
// 
/ 
// 
30.10 
81.1 
68 
25 
20.2 
26 
8.2 
25 
42 
25 
24.5 
Dec. 15 
29.57 
79 
99 
99 
16.2 
25 
51.8 
99 
46.2 
99 
31 
17 
29.67 
77 
99 
99 
19.1 
26 
8.7 
99 
46.9 
99 
34.4 
19 
29.85 
74 
99 
99 
16.9 
26 
3.7 
43.4 
32.0 
20 
29.94 
68.2 
99 
99 
13.5 
26 
1.2 
99 
42.1 
99 
31.7 
21 
30.04 
73 
99 
99 
15 
26 
5.4 
99 
44.1 
99 
31.1 
22 
30.07 
74.5 
99 
99 
18.5 
26 
4.3 
99 
47.9 
99 
33.7 
23 
30.00 
78 
99 
99 
17.3 
26 
3.8 
99 
43.7 
99 
29.2 
Dec. 16 
... Mean ... 
68 
25 
17.1 
26 
3.4 
25 
44.5 
25 
31.0 
Refract. 
and Reduct. 
-2 
2.9 
2 
3.0 
2 
2.9 
2 
3.0 
Superior Culminat. 
68 
23 
14.2 
24 
0.4 
23 
41.6 
23 
28.0 
Inferior 
Culminat... 
7 
28 
21.1 
28 
52.6 
28 
33.9 
28 
22.8 
Half Diff. S. P 
. D. 
30 
27 
26.5 
27 
33.9 
27 
33.9 
27 
32.6 
Inferior Culmination. 
1822. 
Barom 
Microscopes. 
II. 
III. 
IV. 
Dec. 13 
19 
21 
22 
23 
inches. 
29.54 
29.89 
30.00 
30.03 
29.96 
67 
61 
60.5 
62.5 
69 
7 38 44 
„ „ 46.8 
„ „ 43.7 
» ss 35.7 
„ „ 24.7 
39 19 
39 17 
39 26 
38 56 
38 58.7 
38 54.2 
39 5.6 
38 44.9 
38 39.8 
„ 43.2 
„ 45.3 
» 54.5 
„ 40.0 
Dec. 20... Mean... 
Refract, and Reduct, 
7 38 43.0 
-10 21.9 
39 14.5 
10 21.9 
38 55.8 
10 21.9 
38 44.6 
10 21.8 
7 28 21.1 
28 52.6 
28 33.9 
28 22.8 
Mean of 4 Microscopes 30° 27' 31".72 by 13 Observ. 
