AT THE OBSERVATORY AT PARAMATTA 
85 
ri Octantis. (Ann. Var. — 19".33.) 
Superior Culmination. 
Inferior Culmination. 
1823. 
Barom. 
g 
O 
H 
Microscopes. 
1823. 
Barom. 
O 
§ 
Microscopes. 
i. 
II. 
III. 
IV. 
i. 
II. 
III. 
IV. 
June 14 
15 
inches. 
29.86 
29.69 
o 
56.2 
58.0 
o / // 
142 19 53 
142 19 54.7 
20 42.6 
21 2.1 
/ // 
20 45.2 
20 49 
/ // 
20 18.7 
20 21.0 
June 10 
Refract. 
inches. 
30.01 
and Re 
39.2 
duct. 
129 38 39.7 
-51.4 
/ It 
39 47.4 
51.4 
39 28.5 
51.4 
/ // 
39 13 
51.4 
Mean... 
Refract, and Reduct. 
Superior Culminat. 
Inferior Culminat... 
Half Diff. S. P. D. 
142 19 53.8 
-2 10.4 
20 52.3 
2 10.4 
20 47.1 
2 10.4 
20 19.8 
2 10.4 
129 37 48.3 
38 56.0 
38 37.1 
38 21.6 
Mean of 4 Microscopes 6° 19' 56".05 by 3 Observ. 
142 17 43.4 
129 37 48.3 
18 41.9 
38 56.0 
18 36.7 
38 37.1 
18 9.4 
38 21.6 
6 19 57.5 
19 53.0 
19 59.8 
19 53.9 
1828. 
Barom. 
C 
E 
o 
JZ 
H 
Microscopes. 
1828. 
Barom. 
g 
s 
JZ 
H 
Microscopes. 
i. 
II. 
ill. 
IV. 
i. 
II. 
III. 
IV. 
May 24 
25 
27 
28 
29 
July 1 
2 
6 
7 
8 
10 
11 
12 
14 
17 
18 
inches. 
30.22 
30.14 
39.95 
29.87 
29.84 
30.01 
29.99 
29.70 
29.47 
29.40 
29.72 
29.76 
30.00 
29.97 
30.03 
30.20 
0 
56 
56 
61.7 
56 
48.2 
43 
50 
51 
51 
55 
48.5 
53 
40 
63 
53.7 
52 
Off/ 
6 33 38 
» » 31 
» „ 34.7 
„ „ 34.2 
» » 38 
„ „ 31.8 
„ „ 2».5 
„ „ 36.0 
„ „ 30.8 
„ „ 33.0 
„ „ 33.8 
„ „ 36.6 
» „ 41.7 
„ ,, 36.5 
„ „ 31.6 
„ „ 38.0 
33 44 
„ 42.3 
„ 43.8 
„ 45.3 
„ 46.5 
„ 43.5 
„ 42 
„ 47 
„ 43.3 
„ 45.0 
„ 46.4 
„ 41.8 
„ 46 
„ 44 
„ 39.1 
„ 43 
/ // 
33 43 
„ 38.3 
„ 42 
„ 44 
„ 41.1 
„ 38.0 
„ 36 
„ 43.5 
„ 39.2 
„ 38 
„ 46.3 
„ 36.6 
„ 42.3 
„ 38 
„ 36 
„ 38 
/ // 
33 51.2 
„ 44.7 
„ 51.0 
„ 46.5 
„ 44.7 
„ 41.5 
„ 44 
„ 48.8 
„ 42.2 
„ 47.5 
„ 47.0 
„ 48.0 
„ 53 
„ 47 
„ 48 
„ 48 
May 29 
June 6 
7 
9 
11 
12 
16 
17 
19 
20 
inches. 
29.83 
29.55 
29.43 
29.69 
29.93 
30.05 
30.00 
30.13 
30.39 
30.26 
o 
35 
38 
39 
50 
33 
29 
38 
36 
35 
33 
3o3 55 43.3 
„ „ 48.0 
„ „ 48.0 
„ „ 43.3 
„ „ 53.5 
„ „ 56.4 
„ „ 53.0 
,, „ 50.2 
» » 52 
„ „ 56 
t H 
55 55.5 
„ 58.4 
„ 56.0 
„ 55 
„ 59.5 
„ 58.5 
„ 57.0 
„ 55 
„ 59 
„ 59 
/ ft 
55 57.5 
55 58.0 
55 58.5 
55 51.4 
56 1.5 
56 2.0 
56 56 
56 55 
56 56.2 
56 55.2 
/ // 
55 40.0 
55 47.0 
55 43.0 
55 39.6 
55 53 
55 52 
55 51 
55 49.3 
55 50 
56 1.5 
June 11 
Refract. 
.5. ..Mean... 
and Reduct. 
353 55 50.37 
-2 27.8 
55 57.3 
2 27.8 
55 57.1 
2 27.8 
55 48.64 
2 27.8 
353 53 22.6 
53 29.5 
53 29.3 
53 20.8 
Mean of 4 Microscopes 6° 19' 50". 64 by 26 Observ. 
June 5 
Refract 
... Mean... 
— Reduct. 
6 33 34.64 
-34.63 
33 44 
34.6 
33 40.02 
34.65 
33 47.1 
34,8 
Superior Culminat. 
Inferior Culminat... 
Half Diff. S. P. D. 
6 33 0.0 
353 53 22.6 
33 9.4 
53 29.5 
33 5.4 
53 29.3 
33 12.4 
53 20.8 
6 19 48.7 
19 50 
19 48.05 
19 55.8 
Mean S. P. D. of n Octantis, Jan. 1, 1828 6° 19' 5l".02 by 29 Observ. 
For want of room, the columns of Refraction and Reduction have been henceforward omitted ; hut 
the sums or differences of their means have been applied to the means of the microscopes, so that the 
latter corrected means are the divisions of the mural circle corresponding to the superior and 
inferior culminations of the Star’s mean place on the 1st January 1828. These divisions are variable, 
because the position of the tube is altered and the pillar settles ; but their differences are constant 
quantities. 
The second microscope during the years of 1822 and 1823 was subject to frequent derangements, 
from causes over which I had no control. 
