268 PHILOSOPHICAL TRANSACTIONS. [aNNO 1668. 



sopher, in a tract, entitled. Relatione dell' Esperienze fatte in Inghilterra, 

 Francia, & Italia, intorno la Transfusione del Sangue, lately printed in Rome, 

 undertakes to prove that the transfusion is yet of greater antiquity, as having 

 been known to Libavius above fifty years since. For which that Roman author 

 quotes a place out of the said Libavius (in Defensione Syntagmatis Arcanorum 

 Chymicorum contra Heningum Schneumannum, Actione 2, p. 8. edit. Fran- 

 cof. A. l6l5), where the transfusion is so plainly described, that one can hardly 

 discourse of it with more clearness than is there done, in these words : Adsit 

 (says Libavius, 1. c.) Juvenis robustus, sanus, sanguine spirituoso plenus: Adstet 

 exhaustus viribus, tenuis, macilentus, vix animam trahens. Magister artis ha- 

 beat tubulos argenteos inter se congruentes, aperiat arteriam robusti, & tubulum 

 inserat muniatque; mox et aegroti arteriam findat, et tubulum foemineum infigat. 

 Jam duos tubulos sibi mutuo applicet, et ex sano sanguis arterialis, calens et 

 spirituosus saliet in aegrotum, unaque vitae fontem afferet omnemque languorem 

 pellet. This indeed is clear enough, and obliges us to allow a greater antiquity 

 to this operation than we were before aware of ; though it is true, Libavius did 

 not propose it but only to ridicule it ; besides, he contrives it with great danger 

 both to the recipient and emittent, by proposing to open arteries in both ; which 

 indeed may be practised upon brutes, but ought by no means upon man. 



Mr. Gregory's Answer to the Animadversions of Mr. Huygens, upon 

 his Book, De vera Circuli et Hyperholce Quadraturd ; as they were 

 published in the Journal des Scavans of July 2, 1668. N° 37, p- 732. 



This letter is omitted, as of no satisfactory use to any person, without the 

 animadversions which occasioned it, and which were printed in another coun- 

 try. The whole controversy, both animadversions and answers, was collected 

 and printed in Huygens's Opera Varia, vol. 2, pp. 463, &c. 



An Account of some Boohs. N" 37, p. 736. 



I. Discours Physique de la Parole, par M. De Cordemoy, a Paris, in 12mo. 



IL De Infinitis Spiralibus Inversis, Infinitisque Hyperbolis, aliisque Geome- 

 tricis, Auth. F. Stephano de Angelis, Veneto. Patavii, in 4to. 



This author treats here concerning the figures mentioned in the title, mea- 

 suring their areas very accurately and geometrically ; as also concerning several 

 other things conducing to the perfection of geometry. He mentions one of 

 these spirals to be the line described by a heavy body falling towards the centre 

 of the earth, supposing the earth's motion-. He also touches on the controversy 

 betwixt himself and Riccioli, given more at large in the foregoing number. 



