the effects of parallax, &c.for certain fixed stars. 341 
Of the 152 observations of y Draconis. 
5 
48 
99 
In 5 observations the error exceeds 2" 
In 53 observations the error exceeds 1 
In 99 observations the error is below 1 
152 
The errors of each observation of a, Lyra* and of a Aquilse 
are also given in Tables 6 and 7, adopting the results from 
all the observations of mean zenith distance, parallax, and 
constant of aberration, as exact. These stars have been 
selected on account of the great parallax deduced. 
Of the 157 observations of a. Lyra. 
2 
6 
44 
105 
In 2 the error exceeds 3" 
In 8 the error exceeds 2 
In 52 the error exceeds 1 
In 105 the error is below 1 
157 
Of the 135 observations of a. Aquilce . 
2 
8 
4 1 
84 
In 2 the error exceeds 3'' 
In 10 the error exceeds 2 
In 31 the error exceeds 1 
In 84 the error is under 1 
135 
In the above, the results of the observations of one day are 
considered as a single observation ; but in computing the 
values of e , x , and p, each result was considered as having a 
weight proportional to the number of observations ; that is. 
