Changes that happen to the fixed Stars. 215 
Catalogue. 
80 Requires — 18' in RA, and — 6' in PD, 
The PD of 96 requires — 8'. 
Atlas. 
The RA of 30 requires + T. 
72 must be out. 
80 requires — 18' in RA, and — 6' in PD, 
84 requires — io' in RA, and — 12' in PD. 
85 requires — 28' in RA. 
96 requires — 8' in PD. 
Notes to Aquila. 
“ July 23, 1781. Order of magnitude ot. y f Q (3 s/ J 
3 Is larger than 9, contrary to the catalogue. In Flam- 
steed's observations both are marked 6m. 
6 and 12 are both larger than 63 Serpentis ; but that star 
is placed among the changeable ones. See Phil. Trans. Vol. 
LXXVI. page 211. F lamsteed's observations give 3m. to 6. 
13. “Sept. 3, 1784; 2c-feet reflector, 13(e) 5.6 Fl. 3.4m, 
but strong twilight.” It is not much larger than either 11, 
18, or 19, so that we may be pretty certain it must have lost 
some of its lustre since the time of Flamsteed. In his ob- 
servations it is marked 4m. 
20 Is less than 26 and 37, contrary to the catalogue. In the 
observations 20 is marked 3m. 
21 Is less than 23, contrary to the catalogue. But in the 
observations 23 is marked 5m. The error therefore is pro- 
bably in the catalogue. 
