Known as the Early Journal Content, this set of works include research articles, news, letters, and other writings published in more than 200 of the oldest leading academic journals. The works date from the mid--seventeenth to the early twentieth centuries. We encourage people to read and share the Early Journal Content openly and to tell others that this resource exists. People may post this content online or redistribute in any way for non--commercial purposes. Read more about Early Journal

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... ntent at http://about.jstor.org/participate--jstor/individuals/early-journal--content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact support@jstor.org. (736) Ar4c4 wv#nt of fo*,e B,ooks# L. DISCOURS PHY-SIQ"UE DE LA PA. ROLE, pr M D E CO0R DE MO0Y, AParis i'n i 2" which is nowv a printing in Engi/' at LPxdm for Mr oh ari HsA-uthor, after he'ad in-a former difcourfe,wheo lanaccount wvas given Numb.I7p.36 under the Title of Le dfernemeit dio Corps & deY -Ame) propo(d &the w.iy of Know- igo'sfelfe, ihe~ving,. that i't confifils only ndicrigi u fe yes the opei-atiQus of the Soul, and thofe of the Body; doth njow pr-opofe the means -of kNowing others" which is speech. He explicateth, whiati't is, and endeavors,exa-dly to diflinguith) whiat it -borrows from, thet Soul, anid whiat from the Body. In this difquifition,; he reafions upon nothing but what he bath found in him felfe, .and'as if he h-ad never yet been afTur'd, there were any other men befides himfelfe, he Rtays in thie rery beginning upon this confideration, viz., Whether it be necelThry, that -all Bodies" which he fees to be like his, be u-nited to fucli Sou,ls ais his erefolv'd not to beli'eve it, unlefs he have fuch evi. dent fignes of it, that he can doubt no longer thereof. He exa. mnines, what the m-oft fur-prifingy things are) that BRodies do, and as long as hie can impte the caufe of it to the difpciino hi orYg4nS), hec thinks. he nay aiTe they have n'o Sooul But after havingy found in the fole frame and polition, of -the' parts of the B.ody, how to'render a reafon of t-he noife, fo-unds, dif,feren ce of voices, and even of werds, pronoun'ced by.Ecbo's ind PArrr, he finds himfeif at laft obligld to adm-it Souls in all fuch Bodys., asrefemble His, and to acknowledge it not plil,ta they fliould thus fpeak, to pur-pofe as they do, witho ut beingr ca. dow'd with, Reafo6n., Next,having found, that to speak, i's'nothingO but togivefigns oE our thoughts, he takes not'ice of fome of thofe figns The fira, he confidlers,_ are the. motions of thle Face,' and thofe -founds, which ordinarily'accompany the difThrent.flates' of th-e-Body -ob~fti"ing, that.naturally they are joyn'd to Paffions, which th)e foul feel-s ,of that which cannot be found. He delivers alfo a metlhod of drawing Touch-lines to all the Conick Selions, and diverss other Curves, concerning which, the Author fpeaking of tpolltIis, faith Si quis ipfius Con/frnaionem, a/tque dmonfirationem 34. prop, r. lib, Conicorum cum noftris comparabit, nonnihilfortaffe preficet in Arte dilatandi Propofitiones & Demronfratioes. Yam quod Ille de Ouadraticatantam Hyperbole, Ellip,fi, & Circu l t gatnit, Nos ad omnes porrigimus Hyperbolas, Ellifes CircNlofqie Infinitos: And . i 2. the like for infinite Paraolas: And thefe are fome of thofe mattels hlandled by the Authoi, which p 7. he affi:ms to be of excellent ufe, Ad infveniedasplurium linearum nTangents, figurarum Centra gravttatis c^ Ouadraturas: Herein, agieeing with des cartes in his Geometry, p. 4. where fpeaking of the fame matter, lie faith Nec verebor dicere, Problema hoc non esyum modo, qu.fJio, utilifimum & generalifnmum ejfe, fed etiam coram, qua in Geometria f]ire unqfam defideraverim. This excellent Author promifeth fome other Treatifes in his Preface to an Abbot, where he faith ; Si hoc: ajfcqar, at ti; ceterisqve amf$isi earntdem difciplinaritm intelligentibus, frooeetur, mi,ari's crit impoferum, qunam ob rem ha-