. A collection of several philosophical writings of Dr. Henry More. in the determining themotion oi the Spirits into this or that Mufcle % it is impoflible tliat fuchfluid Matter as theCe Spirits , that upon thenoddings of theC<?«/zw;/forward may eafily recede back, fhould ever determine their courfe withthat force and ftrengthtliey are determined. But haply it will beanfwered, That fuch fubtile and fluid bodies as theAnimal Spirits, that are in a readinefs to be upon Motion any way, theleafl thing will ^f?fr?»/«e their courfe; and that the Mufcles themfelves,being well repleniflid with
. A collection of several philosophical writings of Dr. Henry More. in the determining themotion oi the Spirits into this or that Mufcle % it is impoflible tliat fuchfluid Matter as theCe Spirits , that upon thenoddings of theC<?«/zw;/forward may eafily recede back, fhould ever determine their courfe withthat force and ftrengthtliey are determined. But haply it will beanfwered, That fuch fubtile and fluid bodies as theAnimal Spirits, that are in a readinefs to be upon Motion any way, theleafl thing will ^f?fr?»/«e their courfe; and that the Mufcles themfelves,being well repleniflid with Spirits, and framed with [nch FalvuU as willeafily intromit them from the Brain, and alfoconveigh them out of oneoppofite Mufcle into another upon the leafl redundance of Spirits inthe one above the other, and fo fhut them in; that that force we findin Jpontaneom Motion may very well be falved by this MechanicalArtifice. 4, That the infiifficiency of this Anfwer may appear, let us moreaccurately confider the contrivance in the following Figure, which rriuft--. 82 The Immortality of the Soui Boor II. * pyiofNi ^^^ ^^ °^^ ^^ ?^^S ^^ * i?f^//^ has ventured at in his Philofophy, and which may ferve tor the more eafy under ftanding of what ^ Des-tap-16. Cartes writes in his Book of Paflions, Here B C are AniTiI. ^wo oppofite Mufcles, the known Inftruments of fpon-taneous Motion •, K, fome part of the Body to be mo-ved ^ D E and F G are the Nerves through whichSpirits arc tranfmitted from the Brain into the forefaidMufcles •, D and F two FalvuU to let pafs the Spiritsfrom the Brain into the Mufcles, but ftop them it theywould regurgitate^ G is a Valve that lets the Spirits outot the Mufde C into B, and E another Valve that letsthe Spirits out of B into C Now in brief, the refultofthis Mechanicall contrivance is this, viz. That the Spi-rits being determined by the Cortarion never fo littlemore copioufly into B then into C, thofe in C willpafs through the Valve G into
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