( \6oZ ) 
has publifhed in Mathematicks, befides this Book, and 
two fniall pieces, containing the folutions of fome Pre- 
blems propofed by French Mathematicians. He dyed at 
Florence^ An. 1703, and left a great many other Works, 
rather begun than perfed 5 but wffich, fuch as they 
are, will no doubt be acceptable to the Publick, as 
coming from one of fo great knowledge and reputa- 
tion in Synthetick Geometry, and Mechanical Learn- 
ing. 
In the Preface to this Book he gives an .account of 
Ariftceus Senior Geometra^ as far as can be gathered from 
the Ancients, and of his Writings. This Arifiaus wrote 
five Books ofConick^ SeUions^ which Euclid himfelf valued 
ib much as to imitate and add to thera, as Happus fays. 
He wrote other Five Books de Locis Solidis^ which are 
thefe that Vincentio Viviani pretends to reftore. Pappus 
alfo feems to fay that he wrote a Hiftory of what had 
been done in Geometry until his time. And Campanus 
in an Annotation on Prop. i. Lib. XIV. of the Ele* 
ments, mentions a Book of Arifi^us^ intituled, Expofitto 
Scientis quinque Corporum , from whence it may be in* 
ferred that he was of the Platonick Sefl-. 
Tho the Author intended five Books, as Ariflaus had 
written ^ yet he has publiftied only three, and feems 
to defpair of ever publifhiugth^ other two* 
Liber 1. 
In quo de locis Ordinatiomm conicarum LtmiUhns per-' 
tra^atur. 
This Book is divided into five parts. 
Part !• Are 54Lemmatical Propofitions, where are 
confiderafcle e^fes in demonftrating the properties of the 
Conick Seftions from the Regnlatrix ^ Modnli ex SemireUo^ 
ex 
