and nourished with humidity and new always substituted in the place of that which is absumed for I do not see why if radical humidity be wanting that death should follow but answer may be made that the privation or defect of the radical humor depends upon the impotency of heat for whatsoever suffices in the place of its native humour that is necessary to be changed by the help of heat which as Scaliger thinks is altered and grows feeble by use and diuturnity of time therefore what accedes of aliment is more worse and impure then that which decedes therefore heat destitute of idoneous aliment is dissipated And hence it is that man necessarily must dye CHAP. 8. Of Spirits 1. HItherto of humors so called Now we shall handle the doctrine of spirits they are called A spirits because they fly away by their subtil and aereal tenuity which after a certain manner responds to the Nature of Spirits indeed 2. But here the word spirit is taken B for a very small or thin substance aereal and vaporous the first instrument of life as to the performance of action 3. Here its essence is not to be understood ethereal and celestial but in a manner elementary First because such like spirits are what like their matter is but their matter is elementary Secondly they can accend refrigerate increase diminish and extinguish but the celestial on the contrary want these neither can they be changed by natural cause Thirdly because to their preservation the inspiration of the air is necessary Fourthly and lastly the spirits do restore again an elementary body in a swounding fit 4. A spirit is either insited or fixed or influent 5. Insited which is ordinarily C complanatus is an aereal and tender substance lying within several solid members and procreated of the genital seed from the governess faculty of the principal parts the first and proximate seat of native heat and a certain faculty as it were the band of unition of the soul with the body 6. Of this there seems to be so many differences as there are natures and temperaments of parts if it may be accommodated to these and attemperated to the nature of every part 7. The influent is that which is implanted and lest it should dissolve and vanish it remains fixed 8. And here it is threefold natural vital and animal 9. And as in mans body First there are three Vertues Natural Vital and Animal Secondly so also there are three principal bowels if I may so call them the Liver Heart and Brain Thirdly three Organs also administring to these the Veins Arteries and Nerves so there are so many spirits distinct in species and form which are as it were the chariots of strength 10. The natural is D a thin vapour procreated in the liver of the purer part of blood and thence diffused by the veins into the habit of the body to absolve all natural actions 11. Concerning this many great questions are made some do expunge it from the catalogue of spirits First because it takes its natural faculty from the Liver Secondly that it doth renew the same faculty insited from every part Thirdly and by this Spirit or Captain the gross blood is carried to distant parts 12. The vital spirit E is a thin halite vapour or breath begotten of inspirated air and natural spirit carried to the left side of the heart and so runs by the artery over the whole body and so supplies the vivifical strength unto them 13. All the ancient Neotericks do conclude this to be coacted when it is chiefly necessary to life for as Plato doth affirm if the sun should quiesce one moment the whole world would perish because it excites spirit and heat by its motion so here if the spirits be prohibited forthwith the Animal perishes 14. The animal spirit is F a pure halite begotten of a portion of vital spirit carried to the brain and insited in its faculty diffused by the nerves into the body that it may incite it to motion sense and all animal actions 15. This as it pleases some doth not differ from the vital in kinde and nature because they maintain that there is but one universal spirit but as aliment doth take a new form by a new coction and thence a new denomination So that first there are divers Organs Secondly divers faculties Thirdly divers manner of generations so also this spirit is diverse from the rest in species The Commentary A BY spirit here we understand not an incorporeal substance or the intellect of man which is rightly called by the Philosophers a spirit which Scaliger otherwise a man very learned dothseem to dissent from for he speaks Theologically and is to be understood as speaking of an incorporate substance but by spirit we mean a thin and subtil body B Because nature is not wont to copulate one contrary to another unless it be with some medium not unlike a band for mortal and immortal do differ more then in kinde and therefore an incorporate being is not consentaneous to a brittle body and immortality cannot be united to the intellect of man without the concurrence of a medium and this is no other then a spirit which doth bring mortality to the body having a thin and tender substance as it were acceding to the intellect The medium between both is nature and this spirit is not void of a body but begotten of the elements which were in the seed and it is most elaborate nearly acceding to the nature of celestial spirits and most thin that it may fly all sense very apt to pass by an incredible celerity for it passes over the whole body with a great celerity that it may give motion sense and strength to its parts and perform other functions of the soul. D Concerning this spirit many great questions are agitated some do-banish it from the catalogue of spirits moved thereto by these Arguments First because there is no use nor necessity for it We answer Its use is great for first of all it is the chariot of aliment for the humours gotten in the liver can scarce penetrate of themselves through the narrow passages by reason of their crassitude nor can they well be carried to the other parts of the body by reason of the slowness of their motion Furthermore this spirit takes its natural faculty from the liver whose work is to attract retain and concoct familiar aliment to all the parts of the body and by a certain force doth expel the excrements Secondly they will have no place to be given by nature proper for this spirit We answer the liver is its fountain and principle as the heart of life and the brain of the soul. Thirdly they alledge that this spirit doth not lead any thing to any part or carry any thing thereunto But we say that as the animal spirit is carried by the Nerves the Vital by the Arteries so the natural spirit is carried by the veins together with the
which are produced of putrid matter alone without seed so the flye Cantharis hath neither masculine nor feminine nor is it a Pâ—…enix in nature so an Eel is of neither sex and many other C It is disputed by some whether humours or spirits may be rightly reckoned amongst animal parts because they obtain no figure nor certain mode of increment like solid and dimense parts but know that we take the word part largely in this place for all that which is necessary to the constitution of an animate body for whatsoever may not be taken from the whole without a dissolution of that whole that may properly be called part of that whole therefore humors and spirits because if they be taken away the animal whole cannot consist therefore they are adjudged to pass under the name of parts But here it will be demanded whence doth the dissimilitude of the four humours depend from the efficient or from the matter Galen and Avicen do assert that blood doth arise from a moderate and temperate choler from an intense and flegme from a remiss heat But Fernelius more rightly refers the cause of so great variety to the aliment that is â—…o the material cause because it â—…s not consentaneous the same â—…eat in the same time and part â—…o produce contrary effects â—…herefore the cause of this dissiâ—…ilitude is referred to the matâ—…er For whereas aliment which â—…s the matter taken into our boâ—…ies doth consist of divers parts â—…t is altogether consentaneous to â—…uth that those humours which â—…o arise from it cannot be altoâ—…ther of one and the same genus â—…ut divers for what part of the â—…yle is more temperate is converted by the liver into blood and what more hotter is changed into yellow choler and what is crude into flegme and what is terrene into melancholy And these are familiar to the body four manner of ways as Hippocrates saith by which we are constituted and nourished for because the bodies of animals do disperse those things which are excrementitious by certain occult foramens and that by diflation therefore they need aliment D Blood may be understood two manner of ways First for all the four humours which are contained in the veins which when opened blood doth flow out endowed with the four humours for blood is not similar but a mass conflated of different humours Secondly blood may be taken peculiarly and properly for a pure sejoyned humor which is known by this sign that assoon as it is let out into a vessel it concretes and turns into clots by reason of its fibres this humour is called by Hippocrates hot and moist because it conserves the life of the animal which consists of a humid as though material and a calid principle as formal and it is also called temperate by Galen because a hot and moist temperament doth next accede to the temperature because it is the fittestto produce animal-operations and it is called sweet because it arises from a moderate heat and of a temperate and best part of chyle it is called Red or Rubicund because it acquires a colour from the liver that is red for every part propounds this as its end to assimilate that to itself which it altered therefore chyle is taken from the ventricle and transmuted by little and little to the liver and so by degrees doth pass and is converted into its nature and hence it is that it receives its colour from this doth every part attract aliment whence blood is called by some the treasure of life which nature so keeps in such safe custody that all the other humors may receive loss before blood nay some have gone so far as to go about to demonstrate that the soul resides in blood others do affirm that blood is essentially the very soul. E Flegme is gotten of the gross and watrish part of chyle sometimes it is called sweet not that any dulcitude or sweetness doth possess it as it is with honey or sugar but so to be understood as when we say sweet water or water is sweet and when we ascribe frigidity to it we do mean that it is not partaker of the contrary viz. heat but because that coldness is predominant in it for if flegme were onely cold exactly then it would be coacted like unto ice and if it were exactly humid it were void of all crassitude and lentor the effect of it is to nourish the flegmatick members together with blood and it is alimenâ—… half cocted and in progress of time may easily make blood and nourish the whole body F The matter of black choler or melancholy is the more gross and feculent part of aliment not unlike to the fecies of wine or the setlings of oyl This humour is cold and dry because terrene neither yet so cold but that it is a partaker of some heat otherwise it would concrete like ice nor void of all humidity otherwise it would not be an humor but a hard body like to an Adamant its proper colour is black or rather oleaceous which in a temperate man is called black if compared with the colour of other humours it is crass by reason of its terrene nature and it hath sometimes a sowre sapour when much heat cocts the humidity and sometimes sharp when less heat c. its use is to nourish the gross hard and terrene members But here a question may be handled whereas it is said that melancholy is terrene cold and dry therefore unapt to all the motions both of body and minde its strange why Aristotle will have all melancholy persons to be ingenious either in the study of Philosophy or moral Policy in Poetry and many other Arts and Sciences It is answer'd that the strength of wit is discerned and discovered either by quickly learning or strongly retaining In this latter melancholy persons do excel because siccity is necessary and appropriated to the retentive faculty therefore the brain is made firm and contemperated from this humor by the heat of blood and spirit and indeed those that are without this humour are very forgetful and though they may be ingenious yet they are always found to be light and unstable seldom persevering in the thing proposed by reason of the levity of spirits for judgement and prudence is noâ—… perfected in motion but in rest whence Aristotle could affirm that the soul is rendred more intelligible by rest and quietness then commotion and trouble H Avicen besides those two before named doth make other two adventitious humours amongst which those spoken of do possess a medium the first is called innominatus because it never flows out of the veins but the second the Barbarians call Cambium because it desires to flow out and would be changed into the substance of flesh but both of them are rejected yet Fuchsius would have this humor to be the same with the radical but without reason Here it may be demanded whether it may perpetuate life because the oleous or radical is preserved
aliment blood into the general mass of the body But here another question will arise how can the spirits flow into the inward and most remote parts but by penetration and dimension Answer Some bodies are crass and solid and some thin and tender through those that are hard they cannot penetrate but the spirits because they are thin do fly all manner of sense and are diffused without impediment in a moment this way and that way with a certain kind of celerity and do pervade the members neither by their presence filling them nor by their absence emptying them E And in this spirit all the causes come to be considered the matter is the natural spirit procreated in the liver thence carried by the vena cava with the arterious blood that is the purest of blood upwards going into the right side of the heart where it is attenuated most accurately by the passages not altogether occult but if a dog be dissected it will be found in the left side the efficient cause is the strong heat of the heart attenuating and making thin the vital spirit it 's form its rarefaction not unlike to the tenuity of a little flame its end is to conserve life diffused from the heart by the arteries into the universal body F The matter of this spirit is that vital which is carried by the crevices of the arteries to the basis of the brain and it doth slide thereinto as into a net which is placed there by nature as a labyrinth for when any matter would exactly elaborate it doth devise a longer stay in the instruments of coction and afterwards by another context is intromitted into ventricles of the brain the efficient cause is motion but chiefly the proper force of the solid substance of the brain whereby this spirit doth exactly elaborate and so become animal the form of it is rarefaction made perfect by the degeneration of the vital spirit into the animal its end is to shew a sensitive and moving faculty with great celerity from the middle ventricle of the brain by the nerves into the whole body by which spirit the animal faculty is apprehended in man of reason and memory if its force or motion be not hindred CHAP. 9. Of the similar parts of an Animate body 1. HAving expounded the contained parts the continent do follow which consist of substance by reason of that firmness and solidity they have 2. And they are either homogeneous or heterogeneous similar or dissimilar 3. A similar A part is that which may be divided into similes according to the particles of sense and into the same species 4. Of similar parts some are spermatical others carnous 5. The spermatick parts are those which are generated immediately of the crassament of seed and so coalesced into hard substances 6. Of which sort are Bones Cartilages Ligaments Membranes Nerves Arteries Veins Fibres Fat 's Skin 7. Bones are the hardest parts B of animates dry and cold begotten of the crassament of seed by exustion to the stability of the whole 8. These are endowed with no sense because first no Nerves are disseminated by their substance Secondly if they were sensible they could not endure daily labors without great pain and that sensation would either take away the greatest part of action or render it frustraneous 9. A Cartilage C is a kin to these which is a substance or part a little softer then bones and harder then any other member and flexible after a certain manner made to the keeping of motion in its destinated parts 10. A Ligament D is a simple part of the body hard and begotten of seed yet softer then a Cartilage and yielding to the touch knitting the bones together 11. A certain portion of these is called tendous which is a similar part begotten of Fibres Nerves and Ligaments mixed in a muscle all which are called articles 12. A Membrane is a similar part begotten of seed tender covering several other parts 13. The Nerves are spermatick parts arising from the brain or back-bone the interior part of the marrow the exterior of the membrane carrying the animal spirit to sense and motion 14. They are distinguished into softer or harder 15. They are soft which do arise from the former part of the brain 16. And they are seven conjugations for none of all the Nerves are simple but all conjugated whence they are called paria nervorum 17. The chiefest of these are inserted in the centre of the eye and are called the visive or optick nerves carrying the faculty of seeing unto them 18. The second propagation of moving of the nerves is the eyes 19. The third society is partly scattered into the tunicle of the tongue to propogate to the taste and part dispersed in other parts of the face 20. The fourth conjugation is a certain proportion dispersed in the palate 21. The fifth is carried by the auditory passage to the drum of the ears and they are called the auditory nerves 22. The sixth is a large portion of nerves wandring and running almost through all the bowels 23. The seventh arises from the hinder part of the head and the marrow of the back-bone and inserted into the muscles of the tongue and is said to move the tongue 24. The crasser nerves in which there is a more obtuser faculty and they do come out of the marrow of the back-bone carrying sense and motion to the internal parts 25. And thirty of these are alike and combined seven to the hinder part of the neck twelve to the Thorax five to the Lungs six to the sacred bones all which do disperse themselvs like boughs into the other parts of the body 26. The Arteries F are hollow vessels long having two tunicles and those crass and substantial ordained for the deducing of the vital spirit and for temperating and expurging of the heart and other parts to heat 27. And they do arise out of the heart of which two principal Arteries do spring out of the left side thereof from which two all the other take their original Arteria Aorta et Arteria venosa 28. The great Artery Aorta is the foundation of all other Arteries and doth carry the vital spirit to all the other parts of the body 29. The venous artery is stretched out like a quill from the same side of the heart into the liver from whence it brings air to cool the heart 30. A vein G is a similar part and round and hollow like to a reed arising from the liver consisting of one tunicle contexted of three Fibres carrying blood for nutriment together with the natural spirit to the several parts of the body 31. Veins are distinguished into principal and less principal 32. The Principal are those out of which as out of a trunk or stock others do arise and they are two vena porta and vena cava 33 Vena porta is a great vein coming out of the hollow part of the liver and excepting all the Mesenterian veins
compelling them into one of the ligaments serving the arteries to a voluntary motion the fibres of the tendons growing of the junctures are joyned amongst themselves E They are called spermatick parts because they are generated of seed and not of blood which argues that their colour must be white and cold in substance All nerves do arise from the brain and not from the heart as Aristotle imagined their use is to carry that animal spirit gotten in the brain and the motive and sensitive faculty and to communicate it to the body F The veins and arteries are joyned with a friendly intercourse that the veins may supply them with matter of spirit for the spirit doth cherish the blood with its heat in the arteries and there are mutual orifices that the spirit may take nutriment out of the veins and the veins spirit and heat out of the arteries But the arteries and veins do differ First in their original because they come out of the sinister ventricle of the heart Secondly in their function because they subminister vital spirits to the whole body Thirdâ—…y in their substance for the arâ—…eries so likewise the veins do â—…onsist of a membranous body â—…et more solid harder and conâ—…rmed by more crasser tunicles Now a tunicle is twofold exterior interior that fibre which is knit with many strait and crooked windings hath the like crassitude and firmness with the tunicle of the veins but this hath five times a more harder and grosser substance lest the subtil spirit should exhale and the artery it self be broken with the perpetual motion of the heart Fourthly in motion for the arteries are moved without intermission by dilatation and contraction when dilated they draw the cold air and when contracted cast out hot fumes G This question is moved by Physitians and Philosophers about the veins Whether they have a force or faculty to generate blood Some maintain it that the blood which the veins contain within themselves to elaborate more exquisitely and to be made by an insited force and faculty and therefore in that blood that the chiefest degree of perfection is gotten But the falsity of this opinion is easily known by those who diligently mark the thin tunicle of the veins and its white substance Now it is provided by nature that every part of the body should be converted to the other and transmuted into its colour then how can the veins with their thinness and whiteness change white chyle and gross into red and pure blood Therefore more truer is that opinion that the generation of blood is onely the work of the liver which doth make blood by a certain force and faculty within it self seated all the sanguifick force is given to the veins yet they receive it from the liver as Avicen demonstrates H Aristotle and Hippocrates do prove that fibres do concrete the blood by their frigidity because that blood out of which fibres are taken can never be concreted by any cold for when blood is let out of the veins if it doth not concrete it is a sign of death I Fat is the matter of blood and although it be made of the cream of blood yet notwithstanding it is cold and without blood degenerating into fat by the want of heat and frigidity of the membrane it consists of coldness and dryness because by heat it is melted and by the humidity of other parts coagulated by cold The efficient cause is the want of heat which is thus proved because you shall finde no fat as to any quantity about the liver or the heart or any other hot part by reason of the heat of those parts K Take this as another definition of the cutis the skin is a thin part membranous porous endowed with blood the tegument or cover of all the parts of the body which as it is easily taken away by accident so it doth easily grow again which denotes thus much that the skin is not altogether endowed with a sensitive faculty but onely so far as it hath the nerves and of the faculty of blood in it and whereas it is defined to be membranous that is smooth simple thin and white and that it hath a middle nature between flesh and nerves for neither is it altogether without blood as the nerves are so neither doth it abound with blood as the flesh doth whence it is adjudged to be the rule of temperaments and indeed the skin about the hands in it there is the most exquisite and perfect faculty of sense but not so in other parts of the body and the skin is porous that it may thereby attract the coldness of the air and expulse the excrementitious vapours of the body Now the excrement which comes out of the pores is sweat sweat is an excrementitious humidity of the third coction breaking out by the skin in the species or form of water the matter of sweat is the whole humidity which is gotten in meat and drink which thing is necessary to all animals because it might make way for other aliment and not longer lie in the vessels it is of the same genus with urine onely differing in this that the urine is carried to the bladder this with blood a longer passage through the body its efficient cause is heat but not so vehement as to have a drying faculty but moist so calefying the nature of sweat by the habit of the body that it becomes thin and so softens the skin by relaxation that it may the better pass through those whose skins are hard and thick are very unapt to sweat L Flesh may be taken either properly or improperly when properly taken then absolutely that which is described by us and it is the chiefest part of the muscles for the substance of them doth truly and properly deserve the name of flesh that which is taken improperly is the flesh of the bowels generated of blood poured out as the liver heart and lungs CHAP. 10. Of External dissimilar Parts 1. HItherto we have spoken of similar parts Now of dissimilar or organical which are diversly compounded of the similar 2. And they are either external or internal 3. The external parts are first the head secondly the trunk of the body thirdly the artus under which we comprehend the arms and feet 4. The head is the highest part of the body globular set upon the neck the seat of the animal faculty 5. Its parts that are external are chiefly the skull and the face 6. The skull is a crafs bone of the head round distinguished into twenty bones and certain futures covering the brain environing it on every side 7. Its bones are thus distinguished there are two in the crown one in the front two in the temples one in the form of a wedge another in the form of a sieve twelve in the superior jaw and one in the hinder part of the head 8. There are three sutures The first is transverse the crown going from towards one ear to the
is a certain partition which divides either side the vulgar call it the seventh medium which at the first sight appears crass but after a more curious inspection it is found to have many holes in it that there may be an easie passage from the left side to the right notwithstanding what the Neotericks exclaim against it and urge to the contrary 13. Furthermore there are certain appendixes membranous and full of windings leaping to each side of the ventricle which are called Auriculae not from its use or action but similitude 14. On the right side it lies open to the door of the vena cava the left is placed in the orifice of the venous artery and it is larger because it is the receptacle of gross blood the latter is the less because it contains air 15. The chief use of those Auriculars are First that they be ready receptacles of blood and air that they do not confusedly pass into the heart and so to suffocate the heart by oppression Secondly lest the vena cava and the venous artery be broken in violent motions for they have great force in drawing of blood and air in to the heart 16. The lungs E are of rare parts light and spungious and as it were concreted of spumous blood like the substance of a Snail seated in the thorax filling its whole cavity the instrument of breath and voice 17. And although it is but one in body yet it is divided into two parts by the membrane called Mediastinus the right and left 18. Either part consists of two Globes or Knots the one superior the other inferior often discernable and sometimes obscure 19. The use of these is that its flesh or substance should not be collaberated or tyred but that it may be more actively moved and that the heart be embraced on every side 20. The air is transmitted into the lungs by the asper-artery whose structure is constituted of Veins Cartilages Membranes and Nerves The Commentary A DIaphragma hath divers appellations for it is sometimes derived from the verb Diaphratto that is to fortifie because Diaphrattei that is it separates out the middle and low belly and also it is called the seventh transverse it is called Diaphragma and by ancient Medicks called Phrenas because as some judge by its inflammation the minde is hurt It s use is noble for it separates between the spiritual and vital bowels and the heart and the lungs from the naturals which separation Aristotle thinks to be made by nature lest the vapours which do exhale from meat offend the heart in which the soul he thinks doth reside But this opinion is false because the fumes do pass by the Oesophagum To conclude the Diaphragma hath two holes placed in organs ascending and descending Again it helps exspiration and inspiration for when the thorax is contracted then the inspiration is dilated but when it is laxed then inspiration is made Again it helps the ejection of the excrements by its motion with the muscles of the Abdomen Again it is the rise of the organs whereby it pleasantly affects the heart and causes laughter D The covering which defends the heart and contains it in its seat and hinders it lest it should be oppressed with its vicine members is called Capsula which contains also a certain watrish humour lest it should 〈◊〉 and dry with too much heat the substance of the heart is hard and dense lest it should be broken by its violent motions Its substance saith Aristotle is thick and spiss into which heat is received strongly and therefore its temperament is the hottest of all the members it is endowed with three kinds of fibres strait crooked and transverse that it may both draw contain and expel Now Aristotle thinks these fibres to be nerves and the principle of the nerves to be in the heart but he is deceived its figure is Pyramidal but not absolutely so in brutes but it is more flat then in a man it is placed in the thorax as the safest place and on the left side thereof C This is the shop of the vital faculty and therefore it is rightly called by Aristotle the first thing that lives and â—…he last that dies by its perpetual motion and heat it begets vital spirits for when it is dilated which motion is called Dyastole it allures unto it and draws blood by the benefit of the strait fibres from the vena cava by the venous artery but when it is constringed which is called Systole it sends blood from the right ventricle into the lungs by which they are nourished and that by the venous artery but the vital spirit out of the left by Aorta into the whole body and both ways it converts into vital spirit by attenuating the pure blood into vapour D There are two remarkable ventricles of the heart the right and the left between these there is a partition which distinguishes the one from the other which whereas it is crass and firm it is not rightly called by Aristotle the third side or belly but lest that the passages may seem to be made by this it sends out blood into another ventricle by narrow pores E The lung is called by the Greeks pneumon a pneo which is to breath because it is the organ of breathing therefore the lung ought to consist of such a substance that it may be filled and distended with air like a pair of bellows The primary Cause of which action is its proper substance which helps the motion thereof for when it is dilated it draws air and by the venal artery carries it to the heart by which the heat of the heart is allayed and the vital spirit as with food thereby cherished The figure of the Lung resembles the hoof of an ox which is divided by the Mediastinum into two parts it is the organ of voice which I prove because no animal hath a voice that hath not a lung there are some that say that there are two lungs but truly it is but one divided into two parts the right and the left And again both the parts consist of two Globes the one superior the other inferior sometimes seen open and sometimes shut the use thereof is that it may be moved more nimbly and so amplex the heart more easily CHAP. 13. Of the parts of the Animal faculty 1. VVE have spoken sufficiently of the parts of the middle belly Now we proceed to the organs of the supream region serving the animal faculty and they are such as are â—…ontained in the brain 2. The brain A is a soft part white and medullous fabricated of pure seed and spirit involved as it were in folds compassed about with a thin skin and contained in the cavity of the brain the principle of the animal faculty c. 3. And this is the highest of all the bowels and the next to heaven this is the tower of the senses the highest pinnacle the regiment of the minde 4. For the
brain is not onely the seat of sense but the artifex of motion and the house of wisedom memory judgement cogitation in which things man is like to God 5. Therefore nature hath exceedingly fenced it not onely by enrolling it within the skull but also by covering it with other parts therein contained which are two membranes whereof the one is called dura mater the other pia mater 6. Menynx or dura mater is an exterior membrane hard and cuticular covering the brain and fencing it on every side 7. After that is taken away the pia matâ—…r is visible which is a tender membrane the immediate and next cover of the brain not covering the exterior superficies onely but going deep into part of the substance 8. But its substance is thin that it may insinuate it self about all the sides and parts of the brain and thin also because it need not be troublesome to the brain neither in gravity nor weight and that it may deduce the vessel through the whole body of the brain 9. But the whole body of the brain is divided into two parts the anterior and posterior 10. The anterior by reason of the magnitude of it obtains the name of the whole and is properly called Encephalon the brain 11. The posterior is called Pacencephalis that is cerebellum which seems to be 〈◊〉 by nature for the succor of the former that it may keep the animal spirit transmitted from the ends of the brain and that it may be adapted to the marrow of the back 12 The brain above the anterior hath two cavities distinguished clearly by internals called ventricles 13. And these are the receptacles of the spirits which are daily brought out of the heart by the artery and in them they are made more lucid like to celestial flames of fire and that for the better perfecting of the animal actions 14. And they are three in number the right left and middle the two formost are called by some anteriors but more properly superiors 15. The dexter therefore consists in the right part of the brain reaching over the whole length of it from the anterior to the posterior resembling the figure of a half circle its use is the preparation and generation of the animal spirits 16. The left consists in the left part of the brain and it hath the same form seat and use with the former 17. Whence experience doth testifie and the observation of Physitians doth confirm that if the brain be violently compressed or the ventricles bruised that then the animal must needs be deprived of sense and motion 18. For they place in these superior ventricles common sense which doth discern the objects of divers senses 19. The middle or third ventricle is nothing else then the concourse or common cavity of the two former ventricles 20. This doth produce of it self two passages the first whereof receives phlegme the latter is extended to the fourth corner or bosome 21. They place also in it the faculty of imagination and cogitation 22. These are the three ventricles of the anterior part of the brain the fourth is common to the cerebellum and the marrow of the back the last yet the most solid of all the rest because it receives the animal spirits from the former and so transmits it to the marrow of the back 23. This is the place where they say the memory is contained The Commentary A THe substance of the brain is soft and medullous and they say it is so called because it carries the substance of marrow but it differs much from that marrow which is found in the cavity of the bones because it is neither to be melted nor absumed as the other is its use is famous and noble for in this consists fear or courage as also a voluntary motion of the senses without which man stands as an image or pillar And it is not onely the place of sense and motion but the house of wisdom and the shop of the cogitations judgement and memory whereby man comes to resemble God And lastly it is the treasure of the animal spirits therefore by right the brain is the noblest of all members whose excellency if Aristotle had known he would never have written of the nobility and dignity of the heart B Whereas in the opinion os Plato the brain is the first and common sensery The question will be and it is full of intricacy and obscureness whether the brain be endowed with the sense of feeling It is the general answer of modest Physitians and Philosophers that the substance of the brain doth want sense though it be stirred with a daily motion but the membranes which encompass the body of the brain are endowed with a most exquisite sense But some will say how can the brain be void of sense and yet be adjudged the principle of sense this is a nonsequitur If the heart according to Aristotle be the principle of the motion voluntary shall we therefore say that it is moved by the arbitrement of the will when it is rather moved naturally so the brain communicates sense to other members therefore it is endowed with sense this is a nonsequitur Again I answer that Theoreme to be true in logick onely in Homogeneous causes and those also that are conjoyned and not remote for the senses do not remain in the brain immediarely but mediately by the benefit of the nerves which arise out of the brain Yet Scaliger answers the brain to have the force or faculty of sense dunamei but not the act CHAP. 14. Of the Species of Animals viz. of Beasts and they both perfect and imperfect 1. HItherto of the parts of an Animate body the species and differences of animals do follow 2. Therefore an animal is either A Alogon or Logicon 3. Alogon is called a Beast and it is an animal wanting Reason and onely endowed with Sense 4. But here B some go about to make a noise in opposing this both ancient and later writers in declaring that certain beasts by a singular sagacity and art may be obstupefied by artificial operations that they will act those things which cannot proceed from them but they must be endowed with some prudence and reason and besides their particular sense something that deserves to be ascribed to reason 5. It s true they are endowed with some remarkable actions but we must not conclude them to proceed from any reason in them but from a natural instinct 6. And how can Brutes be said to have common reason when reason is a faculty of the soul which doth move and bufie it self to finde out causes from the effects and again from the causes to those effects which are the causes of them 7. Furthermore beasts are either perfect or imperfect 8. They are perfect C which have a perfect body in substance and not in shadow and endowed with blood procreated in them 9. And they are such as either go or flie 10. They are terrestrial which draw
call cogitativam and aestimativam For Madness Phrensie and Melancholy are Diseases that cannot hurt corporeal affections by themselves to wit simply alone but corporeal faculties also for they disturb the minde by accident because it is contained in that very house or situation where this distemper raigns and where the senses are used But Bruits suffer madness by reason of imagination or their estimative faculty not for their reason or understanding C It is common to all perfect animals to have blood and therefore without it they neither can be accounted perfect or produce any vital action for blood is after a manner another soul. D It is a thing common almost to the Universal Genus of fourfooted Beasts that their generation proceeds from the commixtion of the Masculine with the Feminine and they copulate either at certain times or seasons or promiscuously at any time And whereas they are void of reason especially when they have a sensual appetite thereunto at which time the Male is so furiously inflamed with such an irresistable light that it will furiously assail the Female and prosecute her even till his appetite be satisfied as we see often verified in Stags E All Serpents are referred to fourfooted Beasts because they have Blood Flesh Nerves and other internal Bowels of that Nature with them although not so perfect and also dissimilar from the members of those animals This animal is crafty and wise in the preservation of its life in seeking out a Den to lurk in and Food to live on F Volatiles do consist of all the elements but chiefly of water which we may read and prove by sacred writ where it is said That the waters brought forth both creeping things on the earth and flying things in the air where a question will arise why God produced flying things out of the water rather then the earth Because the greatest part of them do reside upon the earth For upon the earth they feed sleep pull off their feathers and altogether haunt the earth and not the water because according to Aristotle we are nourished by those things of which we consist Birds consist of earth rather then water therefore c. This argues that their substance is hard and dense which must needs differ much from the nature of water but little from earth But for the further solution we must know that there is no animal gotten or procreated in the fire or air but in the water and on the earth all Bodies are procreated and that of the commixtion of siccity with humidity but of the two other Elements they receive light temperaments and vertues therefore because Birds are wandring animals they ought to be framed of an Aery temperament that it may be consentaneous to their nature Now Birds are procreated from the water which comes nearest to the nature of air for it is made air extenuated by heat as we see the density of air to pass into water and therefore Birds are produced out of the water into the air as it were a proper Element for their nature G When in the definition we say Birds to be two-footed and winged this ought to be understood of perfect Birds for there are certain Birds found without feet called Apodes and also without feathers of which see Scaliger and it is called a Bird from Avia because it cuts an uncertain flight in the air For there are three things uncertain and past finding out the way of a Ship in the sea the way of a Bird in the air and the way of a Yongman on earth H Other divisions there are of Birds of which see Scaliger Exer. 227. and of the species of Birds see Freigeus his Physicks I By Fish I generally understand all water-animals that swim in water and all these are produced of the water which their natures doth demonstrate for if they be taken out of the waters they die and perish because they are robbed of their proper Nature or Womb but in water they grow and are nourished by reason of the similitude and cogination of their nature with the place which is cold and moist But how can Fish which seem to be constituted of a 〈◊〉 Matter and a mixed body be produced from water alone one simple Element and fluid I answer first the concretion of water in the producing of 〈◊〉 to be done forthwith by the voice and command of God insomuch that it is so constricted and firmly coagulated that the body of fish is solid and well compacted Again we do not deny but that other Elements concur to this aquatical constitution but water hath the dominion whose nature fish emulates because they are cold and moist where notwithstanding we must observe that this same watry constitution doth participate of heat and moisture in which the vital faculty or life doth consist K It is an old tossed question whether fishes that want a lung breathe Aristotle denies it but Plato and all the ancient Philosophers affirm it and these are their Reasons First what animals soever have not the organs of respiration so called cannot breath but fishes have neither lungs nor arteries which are the organs of respiration in all other animals therefore fish breath not Secondly if fish do breath it must either be by the mouth or fins and then they both receive and let out the spirit together but this cannot be because these motions are contrary in themselves and contraries cannot act together in the same therefore fishes do not breath Thirdly if Fishes that are destitute of attractive arteries and lungs breath then they must breath by the benefit of the belly but this is absurd therefore the consequence false The reason of the Minor is that if the belly of fish doth attract air then it would do so in other animals but it is not so therefore c. Fourthly In all those animals that inspire and exspire some part of their body may be discerned to move as in man when he breaths the brest is lifted up if he exspires it is pressed down but in fish there is no such motion to be seen therefore they breath not Fifthly when any breathing Creatures are suffocated in the water certain bubbles will arise if they be there detained till suffocation but if fish be never so long detained they cause no bubbles therefore they breath not neither do they receive any extrinsecal air Sixthly if fish did breath under the water it would follow then that men and other animals might breath also but the consequence is false therefore the antecedent Seventhly if fishes do breath in the water then it is so that they may attract air which they must do also without the water but they do not breath out of the water nor attract air Ergo c. if all animals do breath then insects also should breath which are animals but they breath not Ergo c. the assumption is confirmed for those animals that breath do breath whilst they live and when
poured into the greater veins from the fleshy parts that are already filled and satiated 13. Therefore this blood is laudable and alimentary whose efficient cause is the weakness of the heat of the woman 14. For the female is always more colder then the male therefore she cannot make all the last alâ—…ment and convert it into the substance of the body and therefore by little and little it is sent into the veins of the womb that it may he excerned 15. The time of excretion is not designed but in many it begins at the fourteenth year of their age and ceases about the fiftieth year because then heat grows weak and doth not longer generate the reliques of laudable blood neither can it expel them if they do abound 16. The use of this menstruous blood is very necessary both that it may cause a conception and afterwards nourish after conception 17. Therefore seed is the principle from which as it were the efficient cause the conformation is made from which as from the matter the spermatick parts are generated but blood hath the name of the matter alone and passive principle 18. For of it are both the carnous parts generated and both the spermatick and carnous nourished 19. But to the seed is alotted the nature both of the efficient and matterial principle because it consists of two parts for the efficient is by reason of the Spirits on which on every side is poured the material by reason of the thickness of the body and crassament of which the spermatick parts are generated 20. And the seed is double the one of the male the other of the female but the seed of the male is of greatest force 21. Neither do the Peripateticks altogether deny women to emit seed as Galen and not a few more have exclaimed against them but as they say they do not emit seed as men neither have they such seed 22. For women do put forth seed but not such as men do that is not so crass white and full of spirit 23. For when mans seed is poured out into the womb it is exquisitely mixed with the womans and is as it were in a fruitful field and immediately upon the permixion of the seeds the womb is gathered up together and doth contract it self so close that no empty space be left within 24. Seed so E taken and strictly comprehended is cherished in the womb by its heat and ingenital property exciting its strength lurking within it and stimulates it to act insomuch that it breaks out into action 25. This action of the womb they call conception which is a promotion of the retained seed to duty 26. The Signs of conception F are these a tickling over the whole body upon the meeting of the seeds a retention of the seed if the inward mouth of the womb doth exquisitely shut and open a small pain wandring about the belly if the Tearms be stopped if the brests swell and grow hard a nauseous stomach and frequent vomitings 27. Therefore the spirit of the seeds is used as an instrument for this divine faculty of generation in going to the bottom or centre whereby the work of conception is carried on and of which the conception it self is constituted 28. This work cannot be made without ordination position secretion concretion densation rarefaction extension contraction Arist. 29. Therefore when the spirit begins to act in the substance of the seed consisting of Heterogeneous parts it first divides its dissimilar parts those that are thin and tender and full of spirit it hides within those that are cold and thick which arise from the seed of the woman it covers without 30. The middle and more nobler parts of the seed are puffed up or blowen up by heat and spirit to the effiguration of the members 31. The number of these membranes are yet undetermined we reckon onely three the first whereof is called Amnios which is next to the yong wrapping it from the neck to the feet containing the excrements also with it in which the yong swims as it were 32. The second is called Alantois it is the middle between the first and the third thin and narrow onely going to the middle of the yong and it is the receptacle of urine 33. The third tunicle is called Chorion and it is the outermost covering the whole body of the yong and adheres to the womb by the interposition of the umbilical veins and arteries 34. These 3 membranes mutually connated to themselves do seem to constitute one tunicle which is called by the Latines secundina 35. The interior and subtil part of the seed being encloistered in these and as it were environed the formative vertue and as it were vital spirit of the same seed which contains in potency all parts both similar and instrumental doth coact together and as it were delineated so that the rude exordium of these parts or at least a resemblance of them may be seen which is wont to be made in seven days 36. For when the vital spirit which is the framer of generation is the same and doth act in one and the same moment disposited into the same matter and altered by heat what hinders but that this agent may decline all parts natural once and again 37. Yet there is an order observed in the formation of members I one member is perfected before another 38. And the more nobler and most necessary the first of all the ignobler and least necessary the last of all 39. Therefore the formatrix faculty doth perfect in the first place the spermatick parts of the male in thirty days of the female in forty or fourty two 40. Nor doth it hinder what some learned men do object that so little seed doth not suffice for the constituting of these parts for the sperme is appointed not onely to suffice the formation but the auction also 41. Again if this sperme which proves Abortive or may be known by the section of the living animal be cast into cold water it will scarce exceed the bigness of a large Emmeâ—… 42. The carnous parts are framed after the spermatical delineation from the other principle of generation to wit blood which flows by the navel vein 43. There are three sorts of flesh which grows in the bowels First the flesh 〈◊〉 Secondly the flesh of the Muscles which is called properly and absolutely Flesh Thirdly the peculiar flesh of every part and it is likely that these three sorts of flesh are not generated together but in order 44. For first of all the flesh Parencyma which is the substance of the Liver Spleen and Biters afterwards the peculiar flesh of every part and lastly the flesh of the Muscles 45. And amongst the fleshes Parencymate that of the Liver is the first made because the umbilical vein doth first pour blood into it which concretes after fusion and becomes flesh then that of the heart and lastly that of the rest of the bowels 46. So that the infant begins