(73* > 
whereof we are obliged to the Author of the -Journal Acs Sc*~ 
vans) undertakes to prove,, that the Trans fufion is yet of greater 
Antiquity, as having been known to Libavius above 50. years 
fince. For which, that Roman Author alledgeth a place out of 
the faid Libavius (in Befenftone Syntagmatis Arcanorum Chymi- 
xQtum contra Heningum Schneumannum, altione 2. pag.d. Edit, 
francos. ^.1615.) where the Transfufion is fo plainly defcribed, 
that one can hardly difcourfe of it with more cleernefsj than there 
is done, in thefe words : Adftt (faith Libaviwic.j $uvenur$~ 
buftus,fanus J anguine fp-irituofoplenus : Adftet exbaujlus virtbus, 
tenuis , macilentus , vix animam trahens, Magifier artis habeat 
tubulos argent eos inter Je congruent es, aperiat arterism robufri, &> 
tubulum inferat muniatque 5 m$x & *groti arteriamfindat, & tubu- 
lum femineuminfigat. fam duos tubulos fibs mutuo dpplicet, & 
ex fano fanguis arterialis, calens & fpirituofus faliet in tgrotum^ 
unaque vitdfontem ajferet omnemque languor em pellet. This in- 
deed is cleer enough, and obliges us to averre a greater antiquity 
of this operation than before we were aware of $ though 'tis true, 
Libavius did not propofe it but only to mock at it (which is 
the common fate of new Inventions, in their Cradle;) befides 
that he contrives it with great danger, both to the Recipient and 
Eminent, by propoling to open Arteries in both > which indeed 
may be pra&ifed upon Brutes y but ought by no means upon 
Man. 
Mr. Gregories Anfoer 
To the Animadverfions of Mr. Hugenius upon bis Book^ , De vera Circuli 
& Hyperbolae Quadrature H as they werepftblifid in the Journal des 
Scavans*?/ July 2. 1668. 
THis Anfwer we (hall give the Reader in the fame Language and Words, 
in which the Author of it defired, it might be infcrted in this 
Traft, viz. 
AD ea qua dick D. Hugenius contra meam Circ.& Hyperb.Quadraturam, 
ingenue fateor (cum itta fcriberem) me non anhnadvertijfe exemplnm 
in prof. 10. non ejfe feriem convergent em ; experientiam entm feci folummodo de 
jrimi* & fecundts termintSy non conjiderando tertios cum primis coincidere ; mm 
ratiociniis infiftebam^de exemplis parumfolicitHs : Vt ant em apfareat in hoc nU 
hiUontmri contra noftram Dottrinam, agedum hoc loco 1 o. prop, totidtm ver- 
bis^ fedctm legitime extmflO) refetsmus, 
Prop. 
