221 
Changes that happen to the fixed Stars. 
be any accuracy in these various notations, the star must cer- 
tainly be changeable. 
Notes to Hercules. 
“ May 12, 1783. Order of magnitude |3 £ « < 5 ^^ y e y..” 
3 Is much less than 7. My edition has this star 3m ; that 
of 1712 has it 5m. Flamsteed's observations give 6m, which 
agrees best with 7 - - 5 as I give its present lustre 
8 Is less than 16, contrary to the catalogue. But in the ob- 
servations this star has been marked twice 7m, twice 6m, and 
once 5m. 
11 Is larger than 6 and 35, contrary to the catalogue. But 
in the observations we have this star given twice 4m, and once 
3m. It is therefore undervalued in the catalogue, or is subject 
to changes in its lustre. 
13 Is less than 15, contrary to the catalogue. The obser- 
vations give them both 6m. “ May 25, 1795, 13 and 13 are 
both smaller than Fl. gives them, and are about 7 . 8m." 
20 Is less than 22, contrary to the catalogue. In the ob- 
servations they are both 4m. 
22 “May 12, 1787. 22 (r) 3m, Fl. 4m." 
23 Is not much larger than 2 6, contrary to the catalogue. 
The observations give 23 6m, and 26 7m. 
25. “ May 16, 1787. 23 7.6m, Fl. 3m." In the ob- 
servations this star is also 3m. 
27. By my .observations the light of this star seems to be 
subject to change. Flamsteed's observations give it twice 
3m, and once 2m. 
29 Is less than 24 and 60, contrary to the catalogue. In the 
observations 24 is marked 6 and 3m ; 60 is given 3m, 6m, and 
