Philosophical Transactions of the Royal Society of London

14.2
10.9

%

99

inches.
1 13
May 12 29.67 |75.5 3835 10.4 135 50 135 50 135 13

43
11.9

14 29.93 59 36 25.0 36 32.5 36 33.3 36 25
8.8

16 30.07 41.8 37 36.4 37 44 37 43.0 37 31.7
3.0

19 30.34 39.3 37 54.5 37 58.5 38 2.1 37 51.2
3.0 2030.39 45.3 37 31.0 37 33.5 37 39.8 37 22.3
6.1

27 29.99 51.7 36 50.8 36 59.5 37 3.0 36 47.0

29 29.84 45.3 36 54.3 37 4.0 37 6.0 36 51.3
8.1 || June 6 29.70 48.5 36 44.0 36 53.3 36 53.0 36 45.0
5.2

12 30.02 36.8 37 36 37 38 37 39 37 36.5

23
25
19.3
17.8
20.3
16.1
22.3
20.1
23.7
24.2

13.0
10.8
11.2
12.2
13.0
15.5
16.2

» 4.7

inches,
May 12 29.81 18.4 32 5 6
13 29.88 72.3

9
14| 29.99 60.6

2.5
15 30.08 56

3.7
17 30.15 51.5

4.0
18/30.29 50.3

5.0
19 30.49 51

5.0
20 30.41 56

4.8
23 30.31 56.2

4.7
26 29.97 61.2

5.5
27 29.99 50
28 29.89 47

8.5
29 29.83 46
30 29.81 49

5.0
31 30.01 44

6.9
June 1 30.05 44.7

3.2
6 29.57 46

4.5
7 29.44 44.3

10.7
829.46 51.5

10.0
10 29.75 39.5
11 29.76 35

15.5

» 10.8

» 11.8

» 20.0

May 24... Mean

328 37 1.4 37 8.1 37 5.5 36 59
Refract. and Reduct. -17 11.6 17 11.6 17 11.6 17 11.6

328 19 49.8 19 56.5

19 53.9 19 37.4

11.3
7.5
7.7
8.8
10.7

6.0
12.2
14.0

9.0
13.7

22
22.7
23.2
26.0
18.7
24.3
27.0
24.4
28.5
24.2

20.3
17.0
22.0
19

» 18.5

Superior Culminat. 32 6 24.8 6 32.3 6 40.2 6 26.8
Inferior Culminat... 328 19 49.8 19 56.5 19 53.9 19 37.4

Mean Inside Temperature 59o.
Half Diff. S. P. D. 31 53 17.5 53 17.9 53 23.1 53 24.7 Mean of 4 Microscopes ............ 31° 53' 20'.8 by 30 Observ.
Mean S. P. D. of a Eridani, Jan. 1, 1828 .

31° 53' 18".39 by 82 Observ.

a Eridani appearing in its lower culmination like a double star, the upper being always red and
the lower white, I observed the chord common to their segments

Mean South Polar Distances of the preceding Stars, for the beginning of 1828,

Annual
Variation.

No. of
Obs.

Of Nutation.

S

19
15
58

4

3

22

29

25
24
25
76

-

89

80

2
2

32

6

184

+19.967

5.739
+19.293
+ 3.589
-15.234
- 18.970
- 19.330
+20.026
+19.997
+19.960
- 17.328
- 15.67
+18.436
+17.336

9.433
- 19.997
- 13.328
-16.154
- 10.405
+ 19.972
- 10.405
+19.999

8.600
-11.69
+10.7
+ 8.446
- 12.809
- 13.346
- 19.528

6.034
+16.458
-- 17.735
- 14.844

- 7.62
- 19.871
-10.554
- 13.984
+ 9.406
-12.817
- 14.12

with their Constants of Aberration and Nutation.

Constants

Stars' Names.

Mean S. P.D.
Jan. 1, 1828.

Of Aberrationi

o Octantis
- Octantis .......
- Octantis..
34 Octantis
& Octantis
« Octantis.
n Octantis
3 y Octantis
29 Octantis
1 , Octantis ......
à Octantis

Octantis.
6 Octantis ...

Octantis
y Apodis
B Chamæleontis
m Chamæleontis
a Apodis
1 • Apodis......
B Hydri ..........
2 Apodis....

Octantis
B Apodis
a Chamæleontis
y Hydri.........
· Pavonis c..
2 x Apodis
1 x Apodis
à Muscæ

Piscis Volantis
3 Hydi....
w Argus......
B Argus.....
« Trianguli
a Musca
• Piscis Volantis
Trianguli
à Pavonis
· Trianguli
« Piscis Volantis

8 40 50.11
0 45 12.32
1 34 41.71
2 22 55.65
5 2 15.8
5 6 13.12
6 19 51.2
6 49 7.99
6 52 22.32
7 1 29.77
7 7 54.77
7 40 3.7
7 43 18.12
8 42 40.7
11 30 35.74
11 38 38.1
11 39 53.8
11 41 48.66
11 45 23.33
11 46 35.75
11 47 3.46
11 59 1.25
12 51 44.44
13 37 25.52
15 14 9.7
16 39 6.3
17 8 31.64
17 13 8.1
19 22 52
19 46 53.41
20 33 23.16
20 48 52.45
20 59 24.93
21 18 9.15
21 48 48.54
21 53 19.05
21 57 56.63
23 23 38.44
24 16 20.45
24 17 18.25

S
5 26 36 1.30605
9 27 47 1.27457
6 14 5 1.30242
9 12 16 1.26247
1 9 36 1.29973
11 14 15 1.29707
0 16 11 1.30665
5 26 57 1.30462
5 29 49 1.30202
6 1 24 1.30167
11 4 48 1.28417
10 26 36 1.27529
6 18 26 1.28912
6 24 32 1.28010
10 3 9 1.23604
0 3 8 1.2978
1 19 5 1.30460
10 29 49 1.26470
10 6 37 1.23786

5 21 30 1.30106
10 6 37 1.23786

7 12 52 1.43179
10 0 2 1.22651
1 24 57 1.30430
3 1 28 1.30485
7 29 13 1.20610
10 17 51 1.22325
10 20 1 1.22632
11 26 49 1.27199
2 13 30 1.30608
4 20 49 1.30381
1 3 11 1.30145
1 16 3 1.30514
9 28 45 1.17383
0 2 59 1.27129
2 0 42 1.30637
10 25 21 1.2071

7 22 36 1.16921
10 20 42 1,18424
1 19 43 1.3031

ii 25 35 0.85683
3 19 41 0.96551
0 20 59 0.86904
3 8 16 0.98086 TL
7 18 40 0.91926
5 5 48 0.87317
6 19 41 0.86756
0 6 16 0.85627
0 4 11 0.85676
11 29 20 0.85734
4 22 16 0.89607
4 13 10 0.91506
0 29 52 0.88168
I 745 0.89595
3 21 51 0.961501
5 27 35 0.8560
7 26 23 0.93659
4 14 57 0.91341
3 24 23 0.95656
11 24 25 0.85715
3 24 23 0.95656
0 2 34 0.85645
3 19 25 0.96590
8 1 35 0.94810
9 25 17 0.95460
2 10 47 0.96632
4 1 50 0.94058
4 3 41 0.93645
5 13 19 0.86427
8 16 45 0.97547
10 17 6 0.90650
7 5 3 0.89076
7 20 35 0.92344
3 16 3 0.96994
5 20 58 0.85866
8 5 12 0.9557
4 6 34 0.9300
2 7 42 0.96066
4 1 50 0.94058
7 23 32 0.9301

5

3

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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 9h 52m 116.6,

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

10h 5m 109.5 } East of Greenwich.
Captain King

. 10 5 8.2
Page 26.-Additional Observations of Moon-culminating Stars.

}

m

m S

August 22

Novemb. 16

e 1 Sagittarii
e 2 Sagittarii

+ 8 16.26
+10 4.63

( II.

(I.

20 Piscium
24 Piscium
29 Piscium

+28 15.98
+33 15.55
+39 2.10

Page 46.-Obliquity of the Ecliptic deduced from the solstices observed at

Paramatta:

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Page 128.—The barometer for the lower culmination of a Muscæ on June 23,

was 29.84 inches in lieu of 29.48 inches, and the corresponding refraction
4' 26".52, which makes the south polar distance by a mean of the 4 micro-
scopes for that Set of Observations 21° 48' 49".63.

LONDON:

PRINTED BY RICHARD TAYLOR,

RED LION COURT, FLEET STREET.

Libros

Philosophical Transactions of the Royal Society of London, Volumen 119,Parte 1