C 384 ] 
XXII. Determination of the North Polar Distances and proper 
motion of thirty fixed Stars. By John Pond, Esq. Astronomer 
Royal, F.R.S. 
Read June 15, 1815. 
When a standard catalogue of some of the principal fixed 
stars was laid before the Society in the year 1813 , 1 ventured 
to state as my opinion, that the error of this catalogue depend- 
ing on the mechanical construction of the instrument, did not 
probably exceed a quarter of a second. 
This opinion has been confirmed by the observations of 
another year; the results of which I have now the honour of 
transmitting to the Society, as it appears that in those stars 
which I have continued to observe, I have not had occasion 
to alter the position of any one, above one-tenth of a second. 
For this reason I should hardly have thought it necessary 
to make any farther communication on the subject, had I not 
wished for an opportunity of adding some valuable deductions 
respecting the proper motions of these stars. 
The comparison of my own catalogue with that of Dr. 
Bradley in the year 17,56, is shown in one of the annexed 
tables, (Table II.) in which the proper motions are given in 
the last column. 
I have also subjoined to my own observations the mean 
state of the barometer and thermometer, so that the correc- 
tion may be easily made for any other table of refractions, 
