540 Mr. Pond on certain changes which appear, &c. 
of all the stars are uniform : it moreover supposes the present 
Catalogue for 1823 exact. It has been seen, that it is quite 
impossible to reconcile the very best catalogues to such a 
supposition ; as has been particularly exemplified in the ob- 
servations of Greenwich and Dublin for the year 1813. The 
Greenwich Observations for that year will be found very 
erroneous, and those of Dublin still more so. Indeed it ap- 
pears to me that the Dublin observations cannot be placed in 
a more unfavourable point of view, than by supposing the 
southern motion in question not to exist. 
Table VI. contains the Catalogues of Mayer and Bradley ; 
the former is corrected by a common quantity 3", 5, which 
I find necessary to equalize the positive and negative dif- 
ferences. 
