of a new Variable Star, i q i 
In order to obtain a point of comparifon, for fettling the 
periodical changes of tj Antinoi, which I fuppofe to be con- 
ftant, it is natural to fix upon that phafis, which can be deter- 
mined with the greateft precifion ; and this feems to be at the 
time when it is between its leaft and greateft brightnefs, as 
the whole increafe of brightnefs is completed In lefs than 
24 hours ? though the perfed completion Is performed only in 
36 ± hours ; thus having fettled this necelfary point, and found 
roughly the length of a fingle period^ the computations! in 
©rder to obtain greater exaffcnefsj, are as follows* 
"S z 
Time 
