I to kfiow, that ihf bf|m«lfi| Mmh nm , it wifl equal, 
or even exceed the Stars of %\\^ Third Magnitude s noting^ that from 
the Obfervations hitherto made of this Star ^ it is manifeft , that 
the grentefi Fhfes thmoi do every year anticipate by 32, or 9^. 
dkyts $ forafmuch as Jf^,x66o, itsgreateft' Jppear^^ce ms abouc 
:^e end of oader arid the beginninig of November*^ Jn. 1661, 
^00 1 the end of SefUmkr > or the beginning of Octobnh An. 1 66%. 
i^bopt the end of A^i^u(^^ ^c, fo that this year k muft be in Mmh^ 
iftheformer Analogy do hold, ' 
He collects alfo from the Obfervationi' y That one Period bom. 
t}i^ gmtefi fhafu tothe neKt , confiftsdf about 313, dayes? but 
that the interval of the time betwixt tlie times of it$ beginning to 
appear equal to the Stars of the Smt Magmt^de ^ and of its ending 
to do fo 5 confifts of about, i^©, dayes i And that its gre4te(} Af- 
fearm^e about 15, dayes t AH which yet he would haveun- 
derftood with fome latitude. 
This done^ he proceeds to the inveftigation of the Caufes ofthe 
ViciflTuudes in theEmerfion and Disappearance of this Star ^ and 
having difcourfed 5 That the apparendncreafe and Decrement of 
every Lucid B'ody proceeds f#l^r from its changed diftance from 
the Hye ofthe Obferveri from its various fite and pofition in 
refpeil of him ^ whereby the angle of Vifion is changed ^ or from 
the increafe or diminution of the bulk of the lucid body it felf : and 
having alfo demonftrated it iropoflible 5 that this Star fi^ould move 
in a Circk ^ or in mEllif§$i and proved it 'improbable that it 
ihould mo'v^im Sir mt Lm % he concludes ^ that there can be no 
other genuin^ or at ieaft 5 no other more probable caufe of its 
Emerfion and Occultatlon than this^ That the bigger part of that 
round Body is obfcure.andinconfpicuous to us ^ and its lefler part 
lucid ^ the whole Body turiiing about its own Center^ and one Axe^ 
whereby for one determinate fpace of time it exhibits its lucid' 
part to the Earthy for anodier^ fubduds it 2 it not being likely^ 
that fires fliould be kindled in the Body of that Star ^ and that the 
:matter thereof ihould at certain times take fire and Ihioe ^ at other 
times be eKtinguiiht upon the coafomption of that matter. ' •■ ' 
Sof.ir vf that Star, As to the other in the Girdle of Ar^dromeda^ 
feen about the beginning of An, 1663 ^ he relates , thatj when ia 
the end of l6^. the World beheld the then appearing o^^rf , 
Aftro- 
