[ >«9 ] 
IX. Obfervations and Remarks on ihofe Stars which the AJirono * 
mers of the laji Century fufpedied to be changeable . By Edward 
Pigott, Efq.\ communicated by Sir Henry C. Bnglefield, 
Bart. F. R. S. and A . S. 
Read February 9, 1786. 
TT is about a century ftnce Hevelius, Montanari, Flam- 
steed, Maraldi, and Cassini, noticed a certain number 
of ftars which they fuppofed had either difappeared, changed 
in brightnefs* or were new ones ; and yet to this day we have 
acquired no further knowledge of them. This may be attri- 
buted to the difficulty of finding out what ftar is meant, and 
the not having exa£t obfervations of their relative brightnefs. 
I therefore have drawn up the following catalogue, and made 
the neceffary obfervations; fo that in future we can examine 
them without much trouble, and be certain of any change 
that may take place. To accomplifh this, it was requifite to 
compare with attention many authors and moft of the cata- 
logues of ftars ; in doing which I have perceived feveral un- 
doubted errors,, and others highly probable ; but as entering 
into a difcuffion of fuch difagreements would fwell this account 
confiderably, and make it very intricate, I ffiall avoid, as much 
as pofiible, any thing of the kind that is not immediately 
neceffary. 
In order to feparate certainty from doubt, I have claffed thefe 
ftars. in two divilions the firft are undoubtedly changeable;, 
tiuv 
