the changeable Stars . 197 
Though when at its full it may always be filled of the 4th 
magnitude, it does not conflantly attain exaCtly the fame de- 
gree of brightness, but the differences are very fmall, as 
fhewn below. 
1704, brighter than 4* 
1 708, brighter than 4« 
1784 / ,TVUC h brighter than 4, being nearly 
f between 4 and y Hydrae. 
1785, rather brighter than 4* 
Its mean right afcenfion, computed from my obfervations, 
and reduced to Jan. 1, 1784, is 
o / // 
J from 4 °bfer v ati°ns, compared to f “irg, made between Marcjx 
" 9 3 l and May 1784. 
199 29 21 from 2 ditto, compared to Mayer’s 538, made in May, 1784. 
199, 29 20 from5 ditto, compared to y Hydrae, made between March andMay,i784* 
199 29 24 — mean right afcenfion for Jan. 1, 1784, on a niean. 
Hevelius’s 30th Hydrae is the above ftar ; he marks it of 
the 6th magnitude; I find itin no other Catalogue. 
The famous Nova of 1 604, in Serpentarius. 
A full account of this ftar is given by Kepler, and it feems 
to have had a fimilar appearance to the Nova in Caffiopea 1 
therefore the reflections delivered there need not be again re- 
peated. In July, 1782, I took a plan of the fmallefl flats 
near its place, which was examined every year fince, but no 
alteration was perceived. 
/3 Lyrae. 
Mr. Goodricke difcovered the variation and period of this 
ftar, and hopes foon to fettle its different phafes with nnore 
exa&nefs ; 
