the effort of that part We shall not make it our business to oppose this circulation and though it be accompany'd with great difficulties yet may it nevertheless be affirmed that it is true and that it is effectually wrought though haply not after the same manner as is held by the maintainers thereof It is sufficient for the prosecution of our design to shew that the beating of the Heart is not the cause of the blood's motion especially that which comes into the veins For that done it will be easie to make it appear that they are only the Spirits which can transport it to the places whither it goes and consequenlty that they are bodies distinct from the humours which follow the motions of the Soul and not that of the Heart and may be mov'd by an agitation different from that of the latter Art 8. The heating of the Heart forces not the Blood into all the Parts IT being suppos'd then as the Patrons of this opinion would have it that the Heart by a certain compression or contraction of it self drives out into the arteries the blood which it hath receiv'd into its ventricles and that by the violence of that motion it forces it even to their extremities so to make its passage into the small veins which are near them and thence into the hollow vein and at last to the Heart whence it afterwards passes back again into the arteries and then into the veins perpetually running out of one into another by a continuall circulation This I say being sâ—ppos'd it might be said that there is some probability that this impulsion which it receives from the Heart may cause it to flow along into the arteries but it can never be conceiv'd how this impulsion should be continu'd even into the veins after that its force hath been check'd and broken by so many windings and so many obstructions which the blood must needs meet with in its way What! it shall open the moâ—ths of the vessels it shall force its passage through the fleshy parts as they pretend it shall surmount the impressions which the air and other external causes every moment make in the parts and after all this by vertue of that first impulsion it shall reascend to the Heart with the same agility that it descended thence But this is a thing cannot enter into a man's imagination I am content that as it passes through the small vessels the compression it suffers therein may continue the impetuosity of its motion but that it should be so when it flows into the greater veins and the spaciousness of their channels gives it more liberty is a thing which cannot be affirm'd without a defiance of experience and reason and there is a necessity it should have the same fate as rivers and torrents which flowing out of a narrow into a broad channel abate much of the impetuosity of their course And certainly if the beating of the Heart and arteries causes the blood to be thus moved Nature hath forgot her self extreamly that she gave not the same agitation to the veins especially those in the lower parts where the blood is more gross and heavy and hath so great a way to get up to the Heart For there it is that the cause and instruments of this miraculous transportation ought to be the more powerful having a greater and heavier weight to conduct nay indeed to force upward then is the arterial blood which is more subtile more susceptible of motion and at that time only descends downwards It may then be conceiv'd that those who first advanc'd this opinion never consider'd that fluid bodies cannot long conserve the vertue and impulsion if it be not extreamly strong and that that which is made in the Heart is too weak to maintain the motion of the blood in so long a course and through so many obstacles That if it were forc'd out as they pretend it would so much swell the veins that they would alwayes seem full and stretch'd out especially when it should be forc'd to ascend And in fine that opening the veins it should issue out by certain sallies and reiterations as that which comes out of the arteries since it is the same impulsion that makes both move and that we find in Water-Engines that the water alwayes flows proportionably to the violent shocks it received at the entrance of its channell But why should there be imagin'd in the veins a motion of the blood different not only from that which is made in the bones into the depth whereof it penetrates in order to their nourishment but also from that which conveys the sap of plants to all their parts For this sap and the blood we speak of is the last Aliment whereby they are sustein'd and therefore it is but one and the same Faculty that hath the direction and conveyance thereof and Nature who loves uniformity in all her operations will not easily change this since it may and ought to be performed after the same manner Moreover if the impulsion be the only cause of the motion of the blood it must be also the same of all the natural motions whereby it is agitated And yet that transportation of the humours which Nature makes in Crises and the regularity punctually observ'd by her when she conveys them from one place to another depends on another principle For the violence done in the Heart ought to be equally communicated to all the vessels and cannot determine the blood to flow towards one part rather then another How shall it then cause it to ascend to the left nostril in Inflammations of the Spleen rather then to the right Shall it be also the impulsion that shall force choler to the Intestines in Fluxes without inflammation And convey the serosities to the skin in critical sweats For all these sorts of motions proceed from nature and are made or at least begun in the veins though the beating and impulsion of the Heart and Arteries contribute nothing thereto To conclude since Nature multiplies not the ways of acting in those operations which are of the same kind it is necessary that she cause the blood to ascend by the same vertue whereby she causes the chylus to do so making it to pass out of the Intestines into the Vessels and afterwards conducting it to those places where it is necessary Now I do not think there is any body will affirm that the beating of the Heart contributes ought to this motion as having no communication with the Intestines at least so great as to force the chylus upwards and consequently it may be said that the blood is no more mov'd then it by that impulsion We must therefore find out some other cause then that whereto we may referr not only the ordinary transportation of the blood and all its other motions which though they seem extraordinary are nevertheless natural thereto as those which happen in the Passions but also those of the chylus and the other
and savage according to the quality of the air they breath and which produces that effect by the impression it makes upon the Temperament Lastly that the very Animals themselves are fearful or venturous docile or untractable proportionably to the coldness or heat the thickness or subtility of their blood The reason for which the Temperament is the cause of all these effects is deduced from the secret knowledge which the soul hath of the instruments whereof she makes use in her actions for being so neerly united or joyned to them she knows the weakness or strength thereof and consequently is soon satisfi'd what she may and what she may not do by their means Now though this knowledge be secret yet does it not proceed from the instinct for the instinct is a clear and distinct knowledge which is bestow'd only on the species and consequently ought to be common to all the individuals that are under it whereas this knowledge is different in every one of them and is withall obscure and confused For the Soul hath but a confused knowledge of choler and thence it comes that she represents it to her self in dreams by certain Images which do not absolutely resemble it but have only a certain conformity to it such as are those of fire fighting bright colours c. She does the same thing in Melancholy which she figures to her self by spectres obscurity and inextricable disturbances and so proportionably of the others as we shall press more particularly in the Treatise of the TEMPERAMENTS Now this knowledge how confus'd soever it may be is sufficient to instruct the soul how far she may be able to act or not to act by the assistance of these humours For it teaches her by the experience she makes of it ever and anon that choler is an active and unconstant humour and that it may be serviceable to her in assaulting fighting with and destroying whatever injures her That on the contrary Melancholy is not easily stirr'd troublesome and opposite to the principles of life and so of the rest And upon this knowledge the Estimative faculty frames its judgment conformably to the effects produced by these humours which it keeps in the memory and every foot refreshes by new apprehensions by that means rendring them perfectly representative and capable of producing the inclinatiâ—ns which we commonly observe therein Art 4. That the Conformation of the parts is a cause of the Inclination AS to the Conformation of the parts I do not think any body doubts but that it is a certain sign of many Inclinations in as much as it is observable that without any art but only by the bare inspection of the lineaments of the face the humour and thoughts of some persons may be in some measure discovered That those men in whom there is a certain resemblance to certain other Animals are inclinable to the same passions as they are That such as deal in Horses and Huntsmen consult it very exactly that they may thereby judge of the docility and tractability of Horses and Dogs And lastly that it is come into a Proverb affirming that those are not to be trusted who are guilty of any strange default or miscarriage of Nature But I am further to add that this Conformation of the parts is not only the sign but is also the cause of those inclinations for it gives the soul a bent to certain actions as the Temperament doth Yet is it not to be said that the Conformation is the effect of the Temperament and consequently that it does not denote the inclinations upon any other ground then that it denotes the Temperament which is the true cause thereof and not it For though this may be true in many occasions and that it is certain also that ordinarily the parts are lengthned contracted and assume several figures according to the quality of the predominant humour yet does it very often happen that the Conformation agrees not with the Temperament and that for instance a cold complexion may be consistent with a Conformation which seems to denote heat Accordingly the heart and brain are sometimes too great or too little in the same Temperament which must needs cause a notable difference in the passions over which those two parts have any power Add to this how many cholerick persons are there who have thick and short noses and how many subject to melancholy have them long and sharp contrary to the nature of those humours Who would affirm that all the Tartars and all the Chineses are of the same Temperament because all the former have large faces and that the latter are all flat-nos'd Are there not some creatures of different species that have the same Temperament and yet the figure of their parts is wholy different To be short it is not the Temperament which penetrates the veines and arteries which makes the articulation of the bones divides the fingers and builds up that admirable structure of the parts of every animal But it is the formative vertue is the Architect which the soul imployes to build up a body such as may be fit to perform the actions whereto it is designed and whereas this vertue alwaies endeavours to make the Animal it frames like unto that which produces it if this latter have parts of such a largness and figure the aforesaid vertue which bears the character of it alwaies frames the like if it be not obstructed It is true that many times the Temperament opposes its design and hinders the parts from receiving that figure which the formative vertue had design'd to give them but many times also it does not oppose but leaves it to act according to the measures it hath taken Hence it comes that the imagination of Women with child causes it to change the figure of the Embryo's parts so as that the Temperament makes no opposition Thus the Stars imprint on the body such marks as are not correspondent to the natural complexion thereof c. Art 5. How Figure acts ALl this presuppos'd the next question is to know how Figure which is a barren quality and does not act at all may cause inclinations Nor is it to be imagin'd that it produces them by an active vertue for the Temperament it self though it have that vertue yet does not employ it upon the soul which is not susceptible of material qualities there being not any thing that can really either warm or cool the soul So that both the Temperament and Conformation of the parts are only occasional causes and motives which excite her to the performance of her actions When she hath taken cognizance of the heat which is predominant in the body she frames her judgements conformably to the effects which she is able to produce and afterwards disposes her self to set the organs on work according to the design she hath taken The same thing is to be said of Figure she knows which is which is not proper for certain functions she afterwards makes
the motion of the body and so all those things which are said to be attracted by these qualities are mov'd by another kind of motion then that of Attraction And indeed who can easily conceive that a simple quality should be able so of a sudden and so powerfully to offer violence to things solid and weighty What motion can have an incorporeal vertue to go and find out and bring away massy bodies How is it to be apprehended that contrary to all other qualities which advance forward this only should return back Would there not be a necessity that while it brings back the bodies which it draws after it it should quit the space where it found them which yet continues still full of the same quality True it is and must be acknowledg'd that the Loadstone hath a magnetick vertue which it diffuses out of it self But this vertue is not attractive it only causes in the iron a certain feeling of its presence and thereupon the iron makes towards it of it self as it is in like manner inclin'd towards the iron For if they be both set on the water so as that they may freely swim on it they will approach one another if they be of equal force and if the iron be the more weighty or that it be stopp'd the Loadstone only will move towards it So that it is clear they draw one another no otherwise then as it is said the Sun draws the vapours which by reason of their lightness ascend of themselves after they have felt the heat Art 12. That there is not any attractive vertue in Purgative Medicines NOr is it by Attraction that purgative Medicaments do operate For of these these are some which cause vomiting being apply'd to the soals of the feet and other inferiour parts then which there cannot be a more certain argument of their not attracting the humours since that instead of obliging them to come to themselves they cause them to make a contrary motion Besides the purgative vertue being a natural Faculty should attract the humours which are conformable and consonant to it self in what subject soever they are found whereas far from that it attracts them not at all in bodies which are weak or depriv'd of life And indeed those who have more exactly examin'd the manner how purgation is wrought have shewn that purgatives have no other vertue then that of dissolving and separating the humours as the Rennet does the parts of the Milk And that the separation being made Nature being incens'd thereat expels and drives them out So that the evacuation thereof is wrought not by Attraction but Impulsion Art 13. That Grief and Heat are not attractive THere are yet others who affirm that grief and heat are attractive but they are only the Spirits which Nature sends with the blood into the parts for their support and assistance And this is no true attraction no more then that which is made by a vacuum For a privation which in effect is nothing cannot have any vertue But in this case the bodies put themselves forward to prevent a disorder which Nature cannot bear withall There are not therefore any Attractive vertues and consequently we are not to look for any in Animals in order to the causing of any conveyance of the blood into the veins But there remains this yet to be urg'd to the particular in dispute that it is true the Blood is not attracted but that it moves of it self as does the iron which is sensible of the magnetick vertue of the Loadstone and that having in like manner a certain feeling of the sympathetical vertue inspir'd by the parts it is of it self inclin'd towards them It must be acknowledg'd this expedient would do pretty well if this sympathetical vertue could be well establish'd But how shall we imagine it can subsist in such different subjects as Plants and Animals are or members of a different constitution and temperament such as are those of sound and unsound or diseas'd parts Nay though it should be granted in them What allyance can there be imagin'd between that vertue and the blood which is often alter'd or corrupted between it and the mineral waters which are drunk in fine between it and the poisons which are dispers'd all over the body Nay when all is done neither this means nor any of the others that have been propos'd doth satisfie the regularity which Nature observes in the motions of the blood nor most of the agitations it suffers in the Passions of the Soul nor yet the transportation of the chylus and other humours which is wrought in the body So that there is a necessity of having recourse to the Spirits as the general cause of all these effects And certainly whereas the Blood moves not of it self and that whatsoever is mov'd by another must be either forc'd or attracted or inclin'd neither impulsion nor attraction having any place here it is accordingly necessary that some Body which hath the vertue of moving it self should combine with it and convey it whereever it goes Now since we know that the Spirits are the chief instrmments of the Soul sent by Nature to all the parts to dispose them to action mixt by her with the blood to render it fluid and which she insinuates even into the humours against Nature as well to concoct as force them away there is no question to be made of their being the transporters of the moisture which is in the Vessels since they are beforehand in them to keep them fluid and that there are not any other substances which may be mixt with them to convey them to the places whereto they ought to go And consequently that they are bodies most susceptible of motion which being animated or immediately mov'd by the Soul are the only instruments that can move the blood in all the differences of situation which we observe therein Art 14. That the Blood is convey'd to the parts only by the Spirits FRom what hath been deliver'd it is apparent that in the ordinary course of the Blood the Spirits are the only instruments which cause it to ascend without trouble descend without precipitation and direct and convey it into all the parts nay even to the depth of the Bones for their nourishment By the same Spirits it is diversly stirr'd in the Passions according to the different designs which the Soul proposes to her self they convey it to the wounded parts to relieve them and confine it to an exact observance of that rectitude and regularity which is remarkable in all its motions In a word Nature is the principle and source of all these operations and that Nature is no other then the Soul and her Faculties all which stand in need of Organs in order to their action and can have no other then the Spirits whereto all these effects may be referred They are therefore intermixt with the Blood and as the Air being stirr'd carries along with it the vapours that are got