( 512; ) 
An Accempt: of fome Boo^s. 
l^Profede Sigmri Academki Bologna 3 in Boloina^ i6j2 
^-y-^His is a Complex of i;. Difcourfes, ac feveral times 
i made by feveral perfons of the Illuftrious Academy 
ofB(7/^«^,publi(h'd under the Prefidentlhip of the Noble 
eounT^alerio ^ni. Though thefe diflTertations be all in- 
geoious and learncd,each in their kind j yet we fliall here 
chiefly take notice of the laft of them as moftfucableto 
thedefignof thefe Traftss ) compofed by the Excellenc 
Signor Montanari, concerniog the admirable Changes and 
other Nevelties obfcrv'd ia the Heavens. Touching which 
fobjed: the Author fcruplesnot to affirm againft the fond 
Maintainers of the Immutability and Incorruptibility of the 
Celeftial Bodies, that there is not one Conftellation, which 
fervcth not for an Inftance of wonderfulNovelties and fre- 
quent Changes, either by the Acce(2on of New Stars not 
difcover'd before-, or by the Extioaion of fome of thofe 
that had been obfervd formerly ^ or by increafe of 
Light in forae^ or the diminution of it in others. In the pro. 
ving of this AflTertionhe is very particular | yet fo that he 
riferrs the Reader to a large Treatife, he is now preparing 
under the Title of the INSTABILITIES of the FIRMA-- 
MENX» not doubting but that he fliall make it out to the 
Affertors of the Incorruptibilitj of thefe Vifibla Heavens , 
that even in the Stars anciently defcribed there are obferv'd 
fuch Changes^ as would be fufficient to naake Anjiode him- 
felf, if alive^ change his opinion in this point* / 
Amongft the many particulars, in which this Author in- 
ftanceth to make good his AfGrmatioOj fuch as are the Con. 
ftellations of Andromeda, Perfeus, Vrfa, Draco^and alcBoit 
all the Northern ones, he notetb^ that, having of late years 
found a confiderable diverfity in the Pleiades^ and the nu- 
merous Stars there-aboiit, from them as they were defer-*- 
bed byG^i//7i?4he hath taken the pains of defcribing them a= 
new by a Telefcope of 20 palmes^Cthat is, about 1 3^ foot,) 
and exhibited them in this very Tracl:. Nor 
