Dolæus Johannes
Dolæus upon the cure of the gout by milk-diet
CHAP. IV
It is now proper to apply what hath been hitherto delivered, to the Distemper we are treating of, that from thence the Powers of Milk in the Cure may more clearly appear. We have shewed before how the Mass of the Blood becomes impregnated with a saline Acrimony, more or less Acid, from a sharp and indigested Chyle, and the Powers of Digestion weakned and impaired; whence is easily explained how the Lymph and acrid Serum is communicated to the mucilaginous Glands, and the smallest Branches of the Arteries, so as to infect and coagulate the Mucilage, in Proportion to the Quantity of Salts they contain. The Fibres of the Membranes and Tendons are vellicated by the Acrimony of those Salts, so as to occasion intolerable Pain, and affect the Nerves to a very great Degree.
SECT. 2
From the Diversity of Pains and other Symptoms in the Gout, it appears that these saline Particles are sometimes salt and pungent, sometimes more volatile, sharp and burning. That the mucilaginous Humour is frequently acid and corrosive in the Gout, appears from hence, that this Liquor is neither so easily coagulated, nor acquires so great a Degree of Viscidity by any other Mixture as with austere Acids, and from the Obstinacy and Duration of the Pain. It is frequently observed, that upon the Approach of a Fit, People complain of sowre Belchings, Wind, and vomit acid Humours, so that hypochondriac People, and such as are subject to the Gravel, are most apt to be seized with this Distemper; this may afford a good Reason why not only the drinking of acid Wines bring on a Fit in gouty Persons, but originally occasion the Gout in such Persons as frequently drink them. The Mixture of Wine with the Mucilage plainly evinces, that the acid Particles of the Wine give a Disposition to the Distemper, for it caused a greater Coagulation of the Mucilage than Oyl of Vitriol, whence easily appears what Mischief it may do to gouty Persons.
SECT. 3
How this sharp acid Humour comes to be secerned in the Glands, seems to want Explanation, and this I judge to be in the following Manner. The Blood being first imbued with a sufficient Quantity of these saline heterogeneous Particles, which it receives from the corrupted Chyle, is by Degrees disturbed in its Motion, and the Fibres of the Nerves begin to be sensibly irritated, so as to cause irregular Motions of the animal Spirits. The Blood itself is thickned, because these saline and viscid Particles get into the small Ramifications of the Arteries, and occasion Obstructions there; by this Means the natural Functions and Secretions of the Humours, especially in the Glands, are disturbed, and proceed slower; and accordingly for some Time before the Fit, we find Complaints of Crudities in the Stomach, a swelling and Heaviness of Body, and Weakness and Numbness of the Limbs, which increase daily till the Fit is formed. At length the Blood, by continued Irritations, being put into more violent Motions, drives these saline heterogeneous viscid Particles through the obstructed Capillaries into the glandular Vesicles, whence without doubt the Juices there secerned, especially that of which we are speaking, viz. the Mucilage in the Glands in and about the Joints, is not only plentifully stored with these acid corrosive Salts, becomes more viscid and ropy, but also very corrosive and poignant; and while it irritates and corrodes the adjoining Membranes and Tendons, not only causes violent Pains, but also since by the Contraction of the Nerves the Blood cannot move so freely through the smallest Vessels, the Fibres are distended, and an inflammatory Tumor frequently succeeds.
SECT. 4
The Reason why the Gout affects particularly the Hands and Feet, and not all the Joints together, where Glands of the same Nature are placed, seems to be this: The Blood vitiated in the Manner before explained, propelling these saline Parts into the Pores of the Glands, from the inequality of its Motion in the Time of a Fit, does not impel those Salts with an equable Force, but chiefly into such Parts (especially the Feet and other pendulous Members) where the Pressure and Impulse lies heaviest; so dilates the Cavities of the smallest Canals, till at length it deposits Part of such Salts, with other viscid Humours, upon those Glands. Thus being partly freed from those Salts, the Gout does not seize other Parts with the same Violence; for frequently a large Quantity of such vitiated Humours are secerned by Urine, Sweat, and other more open Passages; and it even often happens, that Persons whose Juices are much corrupted, have avoided the Distemper by the Laxity and Openness of their Vessels; yet these very Persons, when the Blood becomes oppressed by these saline Particles in so great Degree, as not to be readily discharged by the larger Passages, they affect the Mucilage in the Glands and occasion the Gout.
SECT. 5
That this Distemper comes by Fits, appears owing to this, that upon the Approach of a Fit much of the morbifick Matter is thrown upon the Glands by the Blood, so that the Blood thus freed from sharp and viscid Particles, moves easier and freer, till such Time as a sufficient Quantity of morbifick Matter is again generated in the Blood; which by separating again, a viscid and sharp Mucilage, the Symptoms of the Gout, are repeated in another Fit. The feverish Chilliness and Shivering that attends the Gout, is to be accounted for from the irregular Motion of the Blood, occasioned by the Salt and viscid Particles; and it is very likely that those very Salts themselves, irritating the Nerves, and occasioning inordinate and violent Motions of the animal Spirits, contribute to such a Fever; this Sharpness of the Blood, while the Salts are thrown forth by Urine or Sweat, remits till the Blood be again infected. We observe that the Gout often prevents other Distempers; for by this Expulsion of the corrupted Parts from the Blood, Distempers which might have arisen from them are prevented.
SECT. 6
Because there is a great Difference made between the fixed and wandering Gout, I shall observe a few Things thereon. As to the wandering Gout, it is observable that the Mucilage of the Glands is often very differently affected from the viscid and saline Particles of the Blood; sometimes these Particles are mixed in different Quantities with the Mucilage, neither have the Salts at all Times the same Degree of Volatility or Fixity; so that the Mucilage may at some Times be only lightly infected, and the Infection be more Volatile, and consequently it may easily move from one Joint to another, or attack many Joints at a Time. The Points of the Salts are in a Manner lixiviated, become more volatilized, and of Consequence are with more ease protruded from the Blood into the Glands, and render the mucilaginous Juices sharper; whence the nervous Membranes are irritated and distended, and the gouty Pain generated.
SECT. 7
The Reason why this morbid Matter is not long fixed in a Place, but is apt to wander from one Joint to another, I take to be this: These saline volatile Particles, when their intestine Motions are increased, are very easily dissipated, either through the Pores of the Skin in sensible Transpiration and Sweat, or by insensible Perspiration, and so the Pain ceases; other Glands, whose Pores are more open to receive this acrid volatile Matter, are for the like Reasons infected, the same Tragedy repeated, and the Particles in like manner dissipated. This is the Reason why the Pains in the Gout are not fixed and permanent, but rather wandring and uncertain, the morbid Particles being attenuated, and pushing to get forth by the Methods now mentioned, vellicate the Nerves in various Directions. It may be further considered, that when by the smallness of the Pores or glandulous Vessels, or any other Disposition, the morbifick Matter cannot be separated from them in sufficient Quantity, and the Secretion once begun is stopped, it recurs to other Glands of the same kind, and thus the morbid Matter is suddenly translated from one Joint to another, and from one Sett of Glands to others, so as to produce this Effect.
SECT. 8
As to the fixed Gout, where the morbid Matter remains long in a Place, I take it that many acid Salts and viscid Humours contained in the Blood, occasion a greater Coagulation and Viscidity in the Mucilage about the Joints and the Tendons, than can be easily dispersed and evacuated; and on the contrary growing more viscid and sharp, it distends and vellicates the small Fibres of the Tendons and nervous Membranes, and occasions a Pain proportional to the Degree of Acrimony and Viscidity in the Mucilage about the Joints and Tendons, generally pretty sharp. The Mucilage is affected in the same Manner as it would be from the Affusion of Aqua Fortis, Spirit of Vitriol, or any other corrosive acid or austere Substance, whence it is manifestly thickned and coagulated. This affords a Reason why such a Gout is not only fixed in a particular Limb, but also why it long remains there. The ingenious Dr. Havers explains this Matter very well; he tells us that when the Matter happens to be thick and gelatinous, it is not to be expected that it should be easily and presently discharged out of the Interstices of the Joints, either by being resorbed or evaporated, when the Consistence of it renders it uncapable of insinuating itself into the minute Pores, and penetrating those narrow Avenues through which it is to pass. And according to the Degree and Nature of the Acid in the morbific Humour, it doth more or less coagulate the Mucilage, and the Part affected is sooner or later, with more or less Difficulty, freed from it, either by the Translation of it to another, or by the more happy Exclusion of it out of the Body. The same Author very elegantly explains the Cause of the Knots in the Joints, where he says that it seems to be no difficult Thing to account for that tophaceous Matter, which is sometimes found concreted in those Parts that have been afflicted with this Distemper. It hath been observed, that an Acid and an Austere, being both mixed with the Mucilage, did produce a plain, a notable and white Coagulation, where the Coagulum, though it was made when the Mucilage was cold, was not so soft and tender, nor dissolvable in Water like that which was made with Acids only; but though it would break, remained distinct in it, and being dried, was easily reducible to a fine Powder like Flower, or the fine Powder of Chalk. Whence he humbly conceives, that where-ever the Gout comes to be nodose, there is not only an Acidity in the preternatural Humour, which is separated by the mucilaginous Glands, and mixed with the Mucilage; but it is an Acid austere, which is no sooner thrown into the Interstices of the Joints and the Sinuses of the Tendons which are thereabout, but it produces a Coagulum in the Mucilage, and that such a one as is not easily attenuated and dissolved, so that it lies fixed and imprisoned there, and in Time, as the aqueous and moist Particles are by the Heat and Spirits carried off, the terrestrial and saline Parts concentrated come nearer together, and coming to be immediately contiguous, do mutually adhere, and are concreted so as to produce that Chalk or tophaceous Matter which is in some arthritick Cases to be observed. And as the Coagulum, which may be made by an Acid austere, seems apt to make a Concretion of that nature, so the Colour of the tophaceous Matter doth answer to that of this Coagulation, so as to seem generated in this Manner.
SECT. 9
The same Author explains the Reason why the Hands and Feet are most subject to this Disorder. In the Hands, as was shewn before, there not only are considerable Glands in all their Joints, but the Tendons which are there inserted, especially those of the Musculi perforantes, have their mucilaginous Glands, so that Nature hath a convenience in these Parts to depurate the Mass of Blood, and they must receive the morbifick Matter, when the Blood in its Circulation obtrudes it upon them, and the Glands are disposed to separate it. The same Thing may be observed of the Shoulder and of the Knees. But of all the Parts none are so frequently afflicted with this Disease as the Feet, and it is plain why they are so. For besides, that they have many mucilaginous Glands in their Joints, and others about the Tendons which are inserted into their Bones, as the great Chord or Tendon of the Muscles which extend the Foot, and those of the Perforantes; I say besides this, they are the inferior and pendulous Parts, so that as their Glands make them capable of entertaining, so their Situation does conspire with the Effort of Nature, to bring down the morbifick Matter into them. Thus far Dr. Havers, whom I have chosen to quote, because he hath exceeded all Authors in treating of the Nature of this Distemper. It is not necessary to add any more upon this Head. What I have omitted for Brevity’s Sake, the Reader may find in my Encyclopædia Medica, where I have treated of the Cause of this Distemper, and evidently shewed how from the Glands and Lymphatick Ducts about the Membranes and nervous Parts of the Joints, a large Quantity of sharp Serum and other lixivial and acid Particles or other morbid Matter thickning and corrupting the Lymph, is secreted and deposited upon the Joints, where they corrode and vellicate the nervous Fibres. Upon the Addition of Particles more than ordinary acid, the Pains become more durable and fixed; insomuch as Salts of different Natures become jumbled together, and from the Agitation and Conflict of the Particles, the Membranes are vellicated and distended in a very painful Manner; neither doth the Pain abate till the Particles get forth of the Glands, or their Conflict being over, leave the Spirits at rest.
CHAP. V
In the next Place we are to enquire into the Properties of Milk, and to find out whence it hath such wonderful Powers in asswaging and curing this Distemper. There are some Authors, especially the Followers of Sylvius, who according to the chymical Scheme would have Milk produced from the Blood in the following Manner; Chyle, which is of a white Colour, may be turned into Blood by the Help of Alcalies; and again the Blood may be reduced to Chyle by the Help of Acids. Junkius, in his Chymistry, hath noted the Experiments when Milk is to be turned into Blood: Take a Pound of new Milk, and mix with it an Ounce of reverberated Salt of Tartar in a large Vessel; in a Quarter of an Hour the Mixture shall turn into a Blood red Colour, several Fibres swimming at Top like Cream. When the Blood is to be turned into Milk, take any Quantity of the foregoing Mixture, and drop in some Vinegar, and it shall immediately re-assume the Form of Milk. In the first Experiment they alledge, that the crude Sulphur of the Chyle is by the Alkali exalted into a red Sulphur; in the second, the exalting Alkali is depressed by the Acid, whence the Sulphur returns to its original white Colour. Junkius is very justly doubtful of the Application of this Experiment; how the crude Sulphur of the Chyle, as they call it, should in so short a Time be changed into Blood by Alkalies, and the Blood, exalted by so many Circulations, be again changed into Milk by Acids, seems very strange. It requires a good deal of Time to change the Chyle into perfect Blood, and the Blood again into Milk, notwithstanding that Women who have no Milk find it in their Breasts soon after Childbirth.
SECT. 2
In order to be fully satisfied of the Nature of Milk, it is necessary to examine into the Manner of its Generation: It seems reasonable to imagine, that the Chyle, once received into the lacteal Vessels, and at length mixed with the Blood, is never again let forth with the same Appearance; only in Women at the Time of Childbirth, when it is plentifully separated, through the Ramifications of the Arteries, by the conglomerate Glands of the Breast. There is evidently a great Agreement between the Milk and the Chyle, in as much as the Chyle consists of a watry, limpid and gelatinous Fluid, with oily or fat Globules swimming therein. These Globules are pellucid, and differ both in Size and Figure; the Reason of its Whiteness is to be imputed to this: The oily Globules are mixed with the watry ones, in such Manner that several very smooth Globules are formed, which reflecting the Rays of Light in right Lines, occasion a white Colour; the same thing is observable in making Emulsions with oily Seeds, or upon mixing resinous Essences with Water, or mixing Oyl and Water, and shaking them well together; in these Cases, the watry and oily Particles, being thoroughly mixed, occasion such a Superficies as reflects a white Colour. Bolin, and several Authors have proved, that the Milk is no other than oily or fat Lymph or Chyle, brought with the Blood to the Breasts, and there deposited in the milky Cells. Berger hath very well explained the Manner of its Separation in the Breasts. The whole Substance of the Breasts, in Women giving Suck, is made up of various Ramifications of Arteries, from the thoracick and mamillary Arteries, which terminate in oval Cells, or glandulary Follicles; from hence the Breast swells with many milky Vessels, terminating in the Nipple; through these the more oily and chylous Parts of the Blood are derived from the Glands, where it is not only separated, and received, but gathered and preserved, while the remaining Mass of the Blood is returned by the Veins and Lymphaticks. These milky Rivulets, after breaking very small from the Ramifications of the Arteries, flow together into several larger Trunks, which in their Progress are united by Insertions of their Parts, in some Places more dilated, in others streightned, from several Cells and Cisterns, where the Milk is gathered and preserved, so as always to have a sufficient Quantity for the Nourishment of the Infant. Lastly, as the Chyle is separated from the Mass of the Food in the Bowels, not by any Precipitation, but by Percolation only; and as in the making of Emulsions, the oily Seeds communicate an oily Milkiness to the Water, and is separated from the grosser Parts by the Sieve, without the Intervention of any precipitating Medicine, so the chylous Juice is separated in the Bowels by gentle Pressure or the Peristaltick Motion, and strained through the Orifices of the lacteal Vessels, to be thence thrown into the Mass of the Blood. In like manner, the Milk is barely separated, by straining the milky Particles from the Blood, through the small Ramifications of the Arteries in the Glands of the Breasts.
SECT. 3
Nuck hath sometime ago demonstrated, that these conglomerate Glands are a Bundle of small Vessels; that their excretory Ducts are Continuations of the arterial Ramifications, and that these Glands owe their Origin to the smallest Branches of the Arteries: These Arteries, which enter the glandular Substance of the Breasts, are imperceptible to the naked Eye, and discoverable only by injecting a very fine Tincture (which Nuck tells us is known to very few Anatomists) into the Artery; this may be so far propelled, as to render the milky Ducts conspicuous. For the better Discovery of this Matter, Nuck instituted another Experiment equally curious and useful; having met a Nipple full of excretory Ducts, he pressed it, and the Breast adjoining, so as to empty all its Contents, and having pitched upon one of the widest Ducts, he injected Mercury so artificially, that he immediately observed the milky Ducts spread like Branchings of Trees; some Part of the Mercury was carried so far as to enter the Arteries, whence the milky Vessels were continued.
SECT. 4
Hence it follows, that these milky Ducts are destitute of Valves, otherwise the Mercury and the injected Liquors would have been obstructed in their Passage. It is indeed observable, that these Canals are in some Places streighter and narrower than in others, so as to give some kind of Obstacle to the Injection; this is not to be imputed to Valves, but to some kind of Hardness peculiar to the Substance of the Glands, by which the milky Vessels are compressed. From hence appears the immediate Inosculation of the milky Ducts, with the small Ramifications of the Arteries, of which these Glands are composed; so that the arterial Blood propels and deposits its chylous and serous Particles by gentle Pressure and Impulse in the milky Ducts, without other Mechanism than bare Straining and Secretion. For the further and more exact Description of these Ducts, see Nuck’s Adenographia.
SECT. 5
It remains now to examine, of what kind of Particles chiefly Milk is composed; which appear to be these three: The first is a fat, butyraceous, oily, and sulphureous Substance. The second is cheesy, earthy, chalky, and saline. The third is the Vehicle of these, viz. serous, which is watry, with a Mixture of nitrous Salts. But these Parts don’t hold the same Proportion in the Milk of all Animals; Cows Milk is most used in Food, it is thick and fat, and contains more Butter than the Milk of other Animals; upon which account it nourishes more, and is more agreeable to the human Body. Ews Milk hath more earthy and cheesy Particles; Goats Milk is in a Mean between these two, only that its Serum contains more of a nitrous Salt; whence Etmuller conjectures, that it hath all the Virtues of Whey made from Cows Milk, especially in Heats and scorbutick Cases. Asses Milk is of all the thinnest, next to human; the Milk of other Animals, as not so usually brought into Food, I forbear to describe.
SECT. 6
It is manifest, that every Part of the Milk exerts an Effect proper to it self; the fat Part, from which the Butter is formed, preserves from the Stone, which affords an evident Reason why Stones taken from the human Body, upon Distillation, afford so small a Portion of Oyl; whence I am of Opinion, that the Stone is most commonly generated in the Kidneys and Bladder, when the Blood is not sufficiently stocked with oily Particles. Upon this Principle it is easy to see why all oily Substances, as Oyl of Sweet Almonds, taken plentifully, is a Remedy in the Stone; for the oily Particles (as Hoffman observes in his Notes upon Poterius) by their Hooks hinder the Saline Spicula from uniting so as to form an hard Substance. It is known in the Chymistry, that Oyl resists Crystallization; and many Artists that are minded to have beautiful Crystals, add rectified Spirit of Wine to their Lye, in order to absorb the Oyl. Upon the same Principles, the Precipitation of the earthy Particles, and the lodging thereof in the Membranes of the Joints, so as to form chalky Knots, are prevented. Poterius tells us of a Woman of Sixty, who was so reduced in her Flesh and Strength, that she was scarce sensible of Pain, who by the Help of Goat’s Milk, was in three Months Time restored to a State of perfect Health, notwithstanding a great Decay of Strength and Flesh, an Hectick Fever, and a Stone; she took at first but four Ounces of the Milk, which was at length increased to eight; at the End of fifteen Days she voided some oblong and Very hard Stones, upon which she began to recover. She continued the Use of the Milk for a Month, at which Time the Fever left her, her Appetite returned, and she began to gather Flesh. She was alive and hearty in the Sixty Eighth Year of her Age, when Poterius gave his Account. Although in this Case the oily Particles of the Blood might contribute much to lubricate the Passages, yet probably the serous Part of the Goats Milk, impregnated with a nitrous abstersive Salt, attenuated the thicker Humours, and irritated the nervous membranous Parts to discharge the Stones. It is observable that after taking plentifully of Milk, the Urine is not only thin and watry, but made also in large Quantities. This fat Substance in the Milk also loosens the Bowels and softens Pain, it resists corrosive Poisons, in as much as it sheaths and anoints the sharp Spicula thereof. Many Empiricks, to shew the Force of their Antidotes (which are generally good for nothing) to the ignorant Multitude, having lined their Stomachs well with Butter, or Oyl, either of Olive or Sweet Almonds, will securely swallow Mercury and even Arsenick, and afterwards taking the pretended Specifick, cheat the poor People of their Money. Poterius experienced the good Effects of Milk, plentifully taken, to break the Force of Poyson; for a Woman, who being very dry, had drank Aqua Fortis instead of Wine, was relieved from the immediate Danger of Death by drinking plentifully of Steeled Milk, with a Dram of Wax, a little Nutmeg, and Terra Lemnia. Tulpius, in his Observations takes Notice, that Goldsmiths, while they handle Mercury and Antimony, keep in their Mouths a bit of Bread thick buttered, or take fat Broths, to guard against their mischievous Effluvia. Milk, by reason of its Oiliness, is one of the best, temperate, and nourishing of Foods; nothing exceeds it in consumptive Cases. These Particles admirably temper any Sharpness in the Body, and are serviceable where the Kidneys are ulcerated, and to scorbutick People, especially if the Juice of Cresses or Scurvygrass be added to it, and taken two Hours before Meals. It is of great Service in Dysenteries, where there is great Sharpness in the first Passages, and chiefly after the Use of absorbent Medicines. Upon the same Account it eases Pains in the Eyes, and the serous Part of the Milk helps much to dilute the Salts; dropt into the Ear, it asswages Pains there, especially when it is attended with a buzzing Noise.
SECT. 7
Since it appears that Milk, by reason of its oily Particles, is thus serviceable in mitigating and curing these Disorders, there is no room to doubt, from Parity of Reason, that the frequent Use of it in the Gout should not break and invert the austere, sharp, saline Particles, and drive them forth of the Body by Perspiration, Urine, or other Discharges; for, (as Waldsmid observes) Salts predominate in this Distemper, which is evident from the itching in the Skin observed to attend the Decline of a Fit. The volatile Salt of the serous Humour going off, insensibly frets the Skin, while that which is fixed in the thick and viscid Humour, and cannot easily fly off, hardens into Knots. I have observed, upon the Application of Blisters to gouty Persons, a Liquor of an high corrosive Nature to flow from the Part.
SECT. 8
I now come to examine the second essential Part of Milk, viz. that which is cheesy, earthy, and somewhat saline. I am not of Opinion that the Acid of the Stomach is increased by this Part, for there is no Acid naturally in the Stomach; if there were, it would be mischievous. Although it be certain that Cheese is acid, and turns sharper by Age, yet those Particles which are precipitated into Chese, are vastly different in the Chyle and the Milk, from what they are in a State of Separation, and after being exposed to the Air. The Salts, which before were nitrous, and of a middle Nature, somewhat volatile, and mixed with oily, sulphureous, or earthy Particles, being agitated by an inward Motion, become more stiff and complicated. These Salts, while in a State of Union with the Milk and Chyle in the Body, by Means of the progressive Motion, are more disunited and smaller, the serous and oily Particles keeping them asunder; and there is neither Time nor Rest allowed them in their natural State to produce fresh Combinations, as they have when deprived of their progressive Motion, in a State of Separation from the Body. That Milk in warm Weather turns sowre, is to be imputed to its intestine Motion, where the Salts, before small and somewhat nitrous, mixed with the oily Particles by the Influx of the Air, change their natural Texture and Figure, and become more rigid and heavy, and so precipitate the light, viscid, and earthy Particles. That the Air contributes much to this Change, appears from hence, because that alone produces a remarkable Quantity of acid Salts in some Bodies. If a Piece of Alum be calcined in the open Fire, upon exposing it again to the Air, it shall double its Weight; so that a large Quantity of aluminous acid Salt may be drawn from thence: And although Milk be coagulated in the Breasts, it happens either from an acid Acrimony in the Blood, or its Motion being stopped, and some Obstructions of the milky Vessels. It doth not appear from any Experiment yet known, that healthy Milk fresh drawn contains any Acid; the Manner in which this Part of the Milk acquires this Tendency, I conceive to be this: We have already asserted, that Milk, in its natural State, contains no Acid, although after being exposed to Warm Air, by Means of some Fermentation and inward Motion, it becomes acid, which is to be look’d upon as a new Production, no way relating to Milk in its natural State. The cheesy Particles of Milk, if I may so call them, when in the Body differ extremely from those which out of the Body form the Cheese; for while in the Body, they are in the Shape of earthy, subtile, viscid Particles, mixed with the Milk, Chyle, and Blood; they give a due Consistence to the Milk, by duly mixing the oily, fat and serous Particles with them, and while in their due progressive Motion, keep the Milk in a proper Temperature, and occasion a slower Motion of the Milk through the milky Vessels.