(a2oi) 
yet one may affurej that flie taketh no lefs than Fourteen years to 
finilh it. 
The Difcoveries,that have been nfiade in the Heavens this laflagea 
do evince, that Changes arc not fo rare there, as formerly was believed* 
If that was true,whatP//;ry faith, that Hiffarchiu, on the occafion of a 
New Star he perceived, made an Enunseration of all thofe which ap- 
peared at that time, there would not be any one Conftellation, in 
which fome change were not found Once that time . in regard there are 
few, wherein there be not found more Stars now than that Ail:ronomer 
fiath noted in them. 
But as the little affurance we have of the exadnefs of Hij>^archm his 
Catalogue giveth us caufe to believe, that many Stars, which were not 
in that Catalogue, were yet in the Heavens •, fo we may well grant, 
that fome of thofe, that have been obferved fince, have not appeared 
always. For,not to fpeak of the*Stars,that have been feen in the Con- 
Ilellatioti of Cajfiofea^ in the Neck of t\\QJVhale^ in the Breall of the 
Swan^ 2Lnd in Serpent arius MonCicur Caffirii hath difcoverM many o- 
ther little ones*, which may very well be prefumed * compare thofe, d if- 
to be New* For example, he hath obferv'd one of the covered by m. He. 
Fourth magnitude^ and two of the Fifth in Caffiopea, vclius> mNumb. 
where *tis certain they were not feen before, many ^Sp.^opi. 
Aftronomers having exadly reckoned up the very fmalleft Stars of that 
ConftelIation,and yet not one of them mentioned thofe three. He hath 
difcover'd Two others, towards the Beginning of the Conftellation 
of Eridams^whcYt we were fure they were not yet about the end of the 
Year 1664, confidering that this place of the Heavens, where paOed 
the then appearing Comet, was diligently beheld by many, who per- 
ceived divers other fmall Stars,without obferving thofe two. The fame 
hath alfo obferved, towards the Ardick Pole Four of the Fifth or 
Sixth raagnitude,which Aftronomers, that always have their Eyes up- 
on that place, would not have failed to note, if they had there ap- 
pear*dbefore» 
Nor are we to wonder at it, that we fee now more Stars in the 
Heavens than there appeared formerly, feeing there appearM thofe 
formerly, which are feen no more now. For M/Cafpm hath ob- 
ferv'd, ^Wthe Star, which Bayerm puts near that which he mark- 
€th in the Figure of Vrfa ;^?W,appears no more that that, which is 
marked A in the Figure of Andromeda, is alfo difappear* d that in lieu 
of that, which is marked v, at the knee of the fame figure, there 
are two others more Nordward • and that, which is noted is 
very much diminiflit, The Star, which Tycho placeth at the ex- 
tremity of Andromeda's Chdn^ and calls it of the Fourth mao^nitude, is 
now fo fraall that one can fcarce fee it : And that vvhich^^is in his 
Catalogue the 20//7 of the Conftellation of Pifces, is now no more 
feen-, unkfs you will fay , that it is gone down lower than/(?//r 
H h h 2 degrees, 
