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A60269 Philosophical dialogues concerning the principles of natural bodies wherein the principles of the old and new philosophy are stated, and the new demonstrated more agreeable to reason, from mechanical experiments and its usefulness to the benefit of man-kind / by W. Simpson. Simpson, W. (William), fl. 1665-1677. 1677 (1677) Wing S3835; ESTC R25204 74,642 191

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and coldness of Earth and Water may be temper'd with the moisture and heat of Air and Fire and so all be brought to a kind of equality Besides Ex iis constamus ex quibus nutrimur but we are nourished by the four Elements and Bodies thence made Ergo. Pyroph Here indeed you seem to come pretty close to the point Hydroph by an experimental Induction as you suppose of the humane Body in the Fabrick whereof you conjecture the four Elements to become the principia materiata and that not only of man 's but also of all other mixt Bodies in the World and this you do by first taking in the Element of Earth as the Basis of the rest and that you ground from Adam's return to Earth from whence he was taken which was part of the sentence God pronounc'd against Man for his disobedience at the fall I must tell you Hydroph that this is no Argument for Earth as a simple Homogenial Element to enter the composition of the Body of Man for that sentence Thou shalt return to the ground for out of it wast thou taken For dust thou art and unto dust thou shalt return seems to me to intimate no more than thus viz. that seeing Man by his transgression had forfeited his right to an Eternal and Immutable Inheritance which upon his obedience had then been confirm'd upon him he had now upon his disobedience a Sentence of the Mortality of Body pass'd upon him and that after the revolution of some years his Body should undergo the same vicissitude and Law of Mutability with other temporary transient mixt Bodies in the World Dust thou art and unto Dust thou shalt return intimates a Reduction of the Body into its primitive minute parts whether in a liquid or dry form whether reduc'd into a Juice or Leffas of the Earth by the fracedo of the Grave or that Juice further coagulated into some Species of Earth For the word in the Original is not 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 by which Earth is signified as being the Sublunary part of the World distinguished from the Heavens or Coelestial Bodies but is 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 which intimates a red elixerated Earth where an efflorescence of the Panspermion of the Macrocosme becomes concentred in as much as 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 which takes its original from 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 is the Microcosme or little World which is the Epitome of the great World And although Hydroph we should admit Earth as a constituent Principle or Element of Bodies which yet in our Hydrologia Chymic by several Mechanical Experiments have demonstrated Water not Earth to be the material Principle of all Concrete Bodies and so to take in Water and Earth as two Elements of Bodies I say notwithstanding that Adoption of Earth to be an Element we see no reason for a necessity of taking in the other two of Air and Fire as Principles of Bodies which you ground upon this Supposition that all Generation is made up of contraries which yet in some sense is true as elsewhere in our Doctrine of Fermentation we shew and therefore having Earth and Water granted as two Elements you conclude a necessity of Air and Fire to temper the other and bring them into an equality by their contrary qualities For if we can Hydroph as we may elsewhere solve those primary qualities of heat and cold dryness and moisture without having recourse to their subjects of inhesion as the Elements are reputed to be then those Elements at least as to the quaternary of them must of necessity cease to be primary constituent Principles of Bodies seeing the Elements in order to the Fabric thereof are to do it by their supposed 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 or combination of qualities And altho that of Aristotle be true viz. Ex iis constamus ex quibus nutrimur yet the Assumption or minor which commonly is annexed annexed thereto viz. but we are nourished by the four Elements and their Concrete Bodies is as false which although they further endeavour to prove by the instance of Plants of which we feed these are they say nourished by Earth and Water are cherished by Heat which proceeds from Fire and are preserv'd by Air and therefore we feeding upon them feed upon the four Elements of which they are made Whereas Hydroph we elsewhere acquaint you how Plants have not their original from the Quaternary of Elements but from Seeds and specifical Ferments which determine the motion of matter into such variety of shapes which we usually see them distinguished into and that chiefly upon matter whose parts are so wrought as to become fluid I mean Water which is the proximate material Subject of most if not all Concretes whether in their Genesis or Metastasis Hydroph But I will give you another instance how we understand the four Elements to be the Principles of mixt Bodies and that is by the destruction or reduction of things into those Principles from whence they take their Original as suppose in burning a piece of Wood you may Pyroph view a separation of the four Elements for the fumes go into Air the expressed moisture of the Wood is of the nature of Water the Ashes is of the nature of Earth and lastly the Fire or Flame is obvious enough to the Eye Pyroph This experiment of the burning of Wood evinceth nothing Hydroph of the pre-existency of the Quaternary of Elements by its reduction into Fume Moisture Ashes and Flame For that by which according to the Peripatetie Doctrine you would have Air to be demonstrated to be a constitutive Principle of Wood is the fume which if so then must this Fume be like the Air a simple Homogenial Body which yet how simple so ever you may repute we know Hydroph how to separate by the Pyrotechnic Art five or six several distinguishable things as if done in close Vessels a four Spirit if openly it separates a soot to the sides of the Chimney as of a great receiver from which we have separated a Phlegm Spirit Volatile-Salt Oyl and Caput Mort. enough to make it justly be denied the being a simple Elementary Principle and therefore some do two things at once viz. both char their Wood and at the same condense the Fumes in large receivers or pipes whereby they get the four Spirit For the charing of the Wood is nothing but a fixation of the Sulphur with the Salt which Sulphur before would flame forth but now being smothered it only glows in the Coal So that that whereby you would demonstrate a reduction of Wood into the Element of Air by the Fumes thereof you see Hydro how we find it to be a mixt Body it self consisting of Heterogeneous parts many of which are further reducible into more primary Principles yea even the very acid Spirit made by distillation of Woods as of Guaiacum Box c. Which one would deem if any to be a simple Liquor is yet by addition of Alkalizate Bodies
part after another till the whole become illuminated may be conceiv'd readily performable by motion For a few firy Particles put into a vibrating agil Flour or into a rapid collision makes a great light and spreads far in a medium whose texture of parts makes no interruption in the transmission thereof To assign a precise figure to the Corpuscles of light is too curious and perhaps hazardous of incurring a contradiction For to say with the Democritans that firy Atoms are of a pyramid form implies me-thinks a tacit contradiction both in Mathematicks as well as in Physicks For according to their Doctrine Atoms even as the word it self implies indivisibility which that these minute Particles should be indivisible and yet Pyramid-wise is to me very strange for being they are bodies and these bodies Pyramids must of necessity be solid Pyramids now that such which are always made up of Lines Superficies and Profundities the natural sequels of Solids should 〈◊〉 … thstanding all this be supposed indivisible is certainly indemonstrable Although indeed if we might imagine with the Cartesians the Globulary Figure seems to be the most congeneal to the nature Phaenomena of Light as being of all Figures the most apt to be moved and most capable of being reflected by its hitting against other Bodies and that because the globular in their incidence upon other Bodies of what figure soever saving such as are concave in their Texture do always touch in puncto which makes them so apt to recoyl and make Angles of reflection answerable to those of incidence and yet to determine a precise figuration of Atoms as such wants not its absurdity as we elsewhere in our Tentamen Physiolog take an oportunity further to enlarge These being premised you see Hydaoph it proves not difficult to assign the cause why the Rays of Light though corporeal should so readily and instantaneously be transmitted through the Hemisphere or rather through the whole Sphere excepting as aforesaid the shades of the Earth and other Planets as to make that Light we see in the World notwithstanding the immensness of the vast medium it wades through the radius of which Circle is both in relation to its self as also to its Circle incommensurable whose motion is always in right lines unless intercepted by the interpositions of opake Bodies Your next Argument Hydroph of the Penetration of Bodies upon the supposition of the corporealness of Light grounded upon the general perspicuity of illuminated Bodies will not be uneasy to refute and that because the bodys of perspicuous mediums are therefore diaphanous in that they are tenuious pliable and thereby easily and readily give way to the transmission of the nimble corporeal Rays of Light which upon that account pervade the tenuious Texture of such mediums even ictu oculi and yet these Rays if compared with other minute Bodies floating in the Atmosphere are not altogether so numerous as we are apt commonly to apprehend For although to our eye plac'd in any point of the diaphanous medium upon the extension of the Body of Light we see the Air totally illuminated as if it were nothing else but Light yet if we consider the largeness of the Texture of our Eye and the proportionableness of an object to render it capable of affecting thereof we shall find that it will require the mustering of a great many of minute Bodies to make up the least sensible Object so that the Texture of the eye is so fram'd by glassy humours as to concenter the largely dilated Rays of Light That thereby it may become serviceable to the transmission of Species For the tunica uvea of the Eye being perforated and defended by the transparent Tunicles call'd Cornea adnata are supposed as a plain Glass or foramen in a dark Room through which the sensible Species of Objects are by the help of Light transmitted but yet so as they appear only inverted Therefore that these Images 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 of things which float within their Orbs may appear in their proper form is required the help of the Crystalline humour which is lenticular convex inserted into the vitrious humour as a Gem in a Ring whereby together with the help of the albuginous humor which is to dint shade the Species of things with their accompanied Light lest it should come too strongly upon the Crystalline convex humor the Species that were inverted in the tunica uvea might be revers'd and put into their due posture in the convex Glass of the Crystalline humour like as the inverted Species transmitted through a plane Glass or foramen into a dark room are reversed by the help of a Tube with a convex Glass in it which thereby represents the Species of Objects at a great distance upon the opposite white Wall or Paper in their due and regular order as for Recreation sake we sometimes have seen For the most of the Dioptricks are chiefly grounded upon the Texture of the natural frame of the Eye So that it is by these Glasses that I may so call them of the Eye that the distant Rays of Light become concentred to make a sensible impression there whereby the Air seems to us to be so totally diaphanous as if there was nothing else but Light when indeed it needs a Collection of its Rays by so skilful a contrivance as the Fabrick of the Organ of the Eye to make it sensible Wherefore it is very apparent that notwithstanding the corporealness of the Rays of Light there is no necessity of the consequence of the penetration of Bodies both because of the distance of the Rays of Light as also of the tenuiousness and pliable fluidness of the medium As to your last Argument Hydroph viz. that if Light was a Body so also would darkness be because contraries for the consequence of which Isee no reason at all that because darkness is nothing else but theinterception of Light which is further manifest in that at the same time that the lucid Body of the Sun or other luminous Body is in motion I mean by its emission of Rays extended at the very same time is darkness made by the shades of opake Bodies For the radius of the Sun-beams extend far beyond the shaded and therefore dark cones of the Earth and other Planetary Bodies so that in the shade there is darkness because Light is intercepted by an opake Body but beyond the shaded cone the Rays become further continued even to the very circumference of its vast luminous Orb and so the like of any other lucid Body for if a Candle be plac'd at a competent distance from a Globe in a large Room so far as the Conical shade of the Globe reacheth so far it is dark but beyond that the Rays are again continued even to the extent of its Orb 's activity if nothing interrupt And now Hydroph having overturn'd your Arguments against let me give you one for all for the corporealness