482 Mr. goodricke’s Account , &c. 
have condantly obferved Algol, at different times, every night 
when the weather permitted, ever fince the 28th of December 
laff ; and upon accurately examining all thefe obfervations in 
my journal, I find, that fo far from containing any appearances 
the lead contrary to the above conclufion, they drongly corro- 
borate it, fince I never obferved that dar varied in any of thofe 
days which, according to that theory, were the intervals be- 
tween its variations. All Mr. edward pigott’s obfervations, 
even at different times from mine, tend to confirm the fame 
conclufion. 
Whether this fingular phenomenon is always the fame ; or 
whether it occurs only fome years, and ceafies intirely in ethers 
(as may be prefumed from the account of montanari and 
maraldi above quoted) ; and whether in this cafe it recurs in 
regular periods of time or otherwife; are curious objects of in- 
vedigation, which can only be determined by a long and regu- 
lar courfe of obfervations for many years. 
If it were not perhaps too early to hazard even a conjecture 
on the caufe of this variation, I fhould imagine it could hardly 
be accounted for otherwife than either by the interpofition of a 
large body revolving round Algol, or fome kind of motion of 
its own, whereby part of its body, covered with fpots or fuch. 
like matter, is periodically turned towards the earth. But the 
intention of this paper is to communicate faCts, not con- 
jectures ; and I flatter myfelf that the former are remarkable 
enough to deferve the attention and farther invedigation of 
adronomers. 
I am, &c. 
