AT THE OBSERVATORY AT PARAMATTA. 
151 
Stars’ Names. 
Mean S. P. D. 
Jan. 1, 1828. 
Annual 
Variation. 
No. of 
Obs. 
Constants 
Of Aberration. 
Of Nutation. 
s o / // 
s o / // 
« Favonis 
25 22 17.12 
- 2.756 
4 
9 9 10 1.9903 
3 5 55 0.98261 
u Argus 
25 43 47.2 
-16.521 
7 
1 18 56 1.2982 
7 12 41 0.9061 
$ Argus 
26 30 20.05 
-18.702 
6 
0 29 17 1.28849 
6 27 2 0.87725 
26 39 11.4 
-14.753 
6 
11 0 21 1.18634 
4 9 5 0.92418 
P> Trianguli 
27 6 42.2 
-11.456 
43 
10 17 35 1.15380 
3 28 2 0.9489 
a. Hydri 
27 35 25.9 
+17.628 
22 
4 23 51 1.29170 
10 24 5 0.89243 
1 a Crucis 
27 51 1-7.1 
-19.987 
33 
0 8 5 1.25617 
5 24 11 0.85722 
a Tuscan® 
28 53 18.46 
+ 17.596 
76 
6 13 16 1.20749 
1 5 21 0.89135 
1 a. Centauri 
29 52 37.66 
-15.985 
4 
2 « Centauri 
29 52 57.205 
-15.984 
94 
11 7 48 1.17946 
4 14 29 0.91217 
30 27 37.7 
-17.690 
29 
11 17 31 1.19829 
4 24 32 0.89160 
n Argus 
31 13 18.7 
-18.779 
13 
1 0 55 1.27704 
6 26 28 0.87640 
£ Crucis 
31 15 15.3 
-19.760 
57 
0 5 14 1.23385 
5 17 24 0.86094 
a Eridani 
SI 53 18.39 
+18.453 
82 
4 26 47 1.277624 
11 0 30 0.88109 
Length of the Pendulum at Paramatta. 
The length of the pendulum vibrating seconds of mean solar time at Para- 
matta in vacuo on the level of the sea at 0° Reaumur, is 992.4128 millimetres. 
My observations for the determination thereof have been published in the 
second part of the third volume of the Memoirs of the Astronomical Society 
of London. I took the measure from a brass meter made by Lenoir at Paris, 
which after my return to London was compared, by Messrs. Troughton and 
Simms, with Sir George Shuckburgh’s Scale of the same metal, and found 
= 39.387988 English inches. Hence follows the length of the pendulum 
vibrating seconds at Paramatta as above 39.0891435 English inches. 
Additions and Corrections. 
Page 17- — The immersion of 82 Geminorum, March 21, 1823, at 9 h 52 m ll s .6, 
is mean time, and not sidereal time. 
Page 29. — The longitude of Government House at Sydney, deduced from the 
Solar eclipses observed by 
Admiral Bligh, is . . 
Captain King 
in t o 1 East Greenwich. 
10 o 8 .2 J 
Page 26. — Additional Observations of Moon-culminating Stars. 
1828. 
Stars. 
Interval. 
1828. 
Stars. 
Interval. 
August 22 
c n. 
e 1 Sagittarii 
e 2 Sagittarii 
m s 
+ 8 16.26 
+ 10 4.63 
Novemb. 16 
<L I- 
20 Piscium 
24 Piscium 
29 Piscium 
m S 
+28 15.98 
+33 15.55 
+39 2.10 
