1 9^ Mr. Pigott’s Observations on 
exadnefs ; I fhall therefore not enter into any detail, being 
certain it cannot be in better hands. In his laft account he 
mentions having fir ft fufpeded the period to be only of fix days 
nine hours; fuch has always been my opinion, and which ma- 
terial point will probably be more fatisfadorily determined in 
his next publication. 
Nova near the Swan’s Head of 1670. 
This ftar was firft feen in December 1669 by Don An- 
tthelme; it foon became of the 3d magnitude, and difappeared 
in 1672, after having undergone feveral variations. I have 
conftantly looked for it fince November, 1781, without fuc- 
cefs; had it increafed to only. the 10th or 1 ith magnitude, I 
fhould have perceived it, having taken an exad plan of all the 
furrounding ftars* 
ij Antinoi. 
The- variation and period of this ftar I difcovered laft year, 
and had the honour of communicating an account of it to the 
Society : . as at prefent a long interval is elapfed fince my firft 
obfervations, and that lately I have noted fome of its phafes 
with exadnefs, I fhall compare them to thofe obferved in 
1784, which of courfe will give refults more fatisfadory. 
The period, as fettled in my former paper, is 7 d. 411.3s 7 ; 
but for reafons there alledged, it muft be much lefs precife 
than the following. 
times when vj Antinoi was between 
its leaft and greateft brightnefs. 
Thefe 
1785, July 18, at 9 h. 
Sept. 6, at 18 
Sept. 27, at 22 
