the effects of parallax, &c. of certain fixed stars. 
TABLE I. 
349 
No. of Days 
of Observa- 
tion. 
No. of Ob- 
servations, 
1818 - 1821 . 
N. P. D. Jan. i, 
1819 , co. lat. 
36 ° 86' 46 ", 5 . 
Const, of 
Aberration. 
Semi-paral- 
lax or p. 
Pplaris - - 
77 
343 
0 / fl 
1 39 24,93 
1/ 
20,18 
II 
— 0,03 
Polaris S. P. 
80 
.337 
I 39 25,16 
20,12 
+ 0,12 
£ Ursce Majoris 
75 
75 
32 38 59,61 
20,16 
+ 0,02 
y Urss Majoris 
105 
105 
35 T 7 55-15 
20,48 
+ 0,39 
£ - - 
109 
109 
33 3 I 9>54 
20,29 
+ 0*33 
K - - 
94 
94 
34 7 34’^5 
20,23 
-f 0,28 
n Ursa Majoris 
99 
99 
39 4 6 47 * 1 8 
20,76 
+ 0,13 
A returns - - 
94 
259 
69 52 13,66 
20,04 
+ 0,61 
0 Ursae Minoris 
53 
131 
15 6 17,74 
20,49 
— 0,13 
x Ophiuchi - 
97 
228 
77 17 5 8 > 2 3 
20,39 
+ 1*57 
7 Draconis - 
152 
152 
38 29 7,51 
19,86 
— 0,08 
x Lyrae - 
157 
227 
51 22 4 2 > 8 4 
20,36 
+ 1,21 
x Aquilas 
135 
320 
81 36 5,11 
21, 3 2 
+ i *57 
x Cygni - - 
94 
154 
45 21 4 2 * 3 ° 
20,52 
+ 0,33 
The heads of the respective columns sufficiently explain 
the numbers of this Table. It may be mentioned, that the 
stars near the zenith have only been observed on the me- 
ridian, and therefore the number of days of observations of 
these stars are the same as the number of observations. The 
other stars have often been observed near the meridian on 
each side. The stars 30° or more from the zenith have 
been observed twice before the reversion of the instrument, 
and twice after ; the Pole Star occasionally still oftener. The 
other stars on the south side of the zenith only once in each 
position of the circle. 
The small negative values of p have been put down to 
show the precise results ; these, it is evident, may be wholly 
attributable to the unavoidable errors of observation ; and 
