And indeed, if you consider how farr the bare Change of Texture, whether made by Art or Nature (or rather by Nature with or without the assistance of man) can go in producing such New Qualities in the same parcel of matter, and how many inanimate Bodies (such as are all the Chymical productions of the Fire) we know are Denominated and Distinguish'd not so much by any Imaginary Substantial Form, as by the aggregate of these Qualities. If you consider these Things, I say, and that the varying of either the figure, or the Size, or the Motion, or the Situation, or Connexion of the Corpuscles whereof any of these Bodies is compos'd, may alter the Fabrick of it, you will possibly be invited to suspect, with me, that there is no great need that Nature should alwayes have Elements before hand, whereof to make such Bodies as we call mixts. And that it is not so easie as Chymists and others have hitherto Imagin'd, to discern, among the many differing Substances that may without any extraordinary skill be obtain'd from the same portion of matter, Which ought to be esteemed exclusively to all the rest, its in-existent Elementary Ingredients; much lesse to determine what Primogeneal and Simple Bodies convened together to compose it. To exemplify this, I shall add to what I have already on several occasions Represented, but this single instance.

You may remember (Eleutherius) that I formerly intimated to you, that besides Mint and Pompions, I produced divers other Vegetables of very differing Natures out of Water. Wherefore you will not, I presume, think it incongruous to suppose, that when a slender Vine-slip is set into the ground, and takes root, there it may likewise receive its Nutriment from the water attracted out of the earth by his roots, or impell'd by the warm'th of the sun, or pressure of the ambient air into the pores of them. And this you will the more easily believe, if you ever observ'd what a strange quantity of Water will Drop out of a wound given to the Vine, in a convenient place, at a seasonable time in the Spring; and how little of Tast or Smell this Aqua Vitis, as Physitians call it, is endow'd with, notwithstanding what concoction or alteration it may receive in its passage through the Vine, to discriminate it from common Water. Supposing then this Liquor, at its first entrance into the roots of the Vine, to be common Water; Let Us a little consider how many various Substances may be obtain'd from it; though to do so, I must repeat somewhat that I had a former occasion to touch upon. And first, this Liquor being Digested in the plant, and assimilated by the several parts of it, is turn'd into the Wood, Bark, Pith, Leaves, &c. of the Vine; The same Liquor may be further dry'd, and fashon'd into Vine-buds, and these a while after are advanced unto sour Grapes, which express'd yield Verjuice, a Liquor very differing in several qualities both from Wine and other Liquors obtainable from the Vine: These soure Grapes being by the heat of the Sun concocted and ripened, turne to well tasted Grapes; These if dry'd in the Sun and Distill'd, afford a faetid Oyle and a piercing Empyreumatical Spirit, but not a Vinous Spirit; These dry'd Grapes or Raisins boyl'd in a convenient proportion of Water make a sweet Liquor, which being betimes distill'd afford an Oyle and Spirit much like those of the Raisins themselves; If the juice of the Grapes be squeez'd out and put to Ferment, it first becomes a sweet and turbid Liquor, then grows lesse sweet and more clear, and then affords in common Distillations not an Oyle but a Spirit, which, though inflamable like Oyle, differs much from it, in that it is not fat, and that it will readily mingle with Water. I have likewise without Addition obtain'd in processe of time (and by an easie way which I am ready to teach you) from one of the noblest sorts of Wine, pretty store of pure and curiously figured Crystals of Salt, together with a great proportion of a Liquor as sweet almost as Hony; and these I obtained not from Must, but True and sprightly Wine; besides the Vinous Liquor, the fermented Juice of Grapes is partly turned into liquid Dregs or Leeze, and partly into that crust or dry feculancy that is commonly called Tartar; and this Tartar may by the Fire be easily divided into five differing substances; four of which are not Acid, and the other not so manifestly Acid as the Tartar it self; The same Vinous Juice after some time, especially if it be not carefully kept, Degenerates into that very sour Liquor called Vinegar; from which you may obtain by the Fire a Spirit and a Crystalline Salt differing enough from the Spirit and Lixiviate Salt of Tartar. And if you pour the Dephlegm'd Spirit of the Vinegar upon the Salt of Tartar, there will be produc'd such a Conflict or Ebullition as if there were scarce two more contrary Bodies in Nature; and oftentimes in this Vinager you may observe part of the matter to be turned into an innumerable company of swimming Animals, which our Friend having divers years ago observed, hath in one of his Papers taught us how to discover clearly without the help of a Microscope.

Into all these various Schemes of matter, or differingly Qualifyed Bodies, besides divers others that I purposely forbear to mention, may the Water that is imbib'd by the roots of the Vine be brought, partly by the formative power of the plant, and partly by supervenient Agents or Causes, without the visible concurrence of any extraneous Ingredient; but if we be allowed to add to the Productions of this transmuted Water a few other substances, we may much encrease the Variety of such Bodies; although in this second sort of Productions, the Vinous parts seem scarce to retain any thing of the much more fix'd Bodies wherewith they were mingl'd; but only to have by their Mixture with them acquir'd such a Disposition, that in their recess occasion'd by the Fire they came to be alter'd as to shape, or Bigness, or both, and associated after a New manner. Thus, as I formerly told you, I did by the Addition of a Caput Mortuum of Antimony, and some other Bodies unfit for Distillation, obtain from crude Tartar, store of a very Volatile and Crystalline Salt, differing very much in smell and other Qualities from the usuall salts of Tartar.

But (sayes Eleutherius, interrupting him at these Words) if you have no restraint upon you, I would very gladly before you go any further, be more particularly inform'd, how you make this Volatile Salt, because (you know) that such Multitudes of Chymists have by a scarce imaginable Variety of wayes, attempted in Vain the Volatilization of the Salt of Tartar, that divers learned Spagyrists speak as if it were impossible, to make any thing out of Tartar, that shall be Volatile in a Saline Forme, or as some of them express it, in forma sicca. I am very farr from thinking (answers Carneades) that the Salt I have mention'd is that which Paracelsus and Helmont mean when they speak of Sal Tartari Volatile, and ascribe such great things to it. For the Salt I speak of falls extreamly short of those Virtues, not seeming in its Tast, Smel, and other Obvious Qualities, to differ very much (though something it do differ) from Salt of Harts-horn, and other Volatile Salts drawn from the Distill'd Parts of Animals. Nor have I yet made Tryals enough to be sure, that it is a pure Salt of Tartar without participating any thing at all of the Nitre, or Antimony. But because it seems more likely to proceed from the Tartar, than from any of the other Ingredients, and because the Experiment is in it self not Ignoble, and Luciferous enough (as shewing a new way to produce a Volatile Salt contrary to Acid Salts from Bodies that otherwise are Observ'd to yield no such Liquor, but either only, or chiefly, Acid ones,) I shall, to satisfie you, acquaint you before any of my other Friends with the way I now use (for I have formerly us'd some others) to make it.

Take then of good Antimony, Salt-Petre and Tartar, of each an equal weight, and of Quicklime Halfe the Weight of any one of them; let these be powder'd and well mingl'd; this done, you must have in readiness a long neck or Retort of Earth, which must be plac'd in a Furnace for a naked Fire, and have at the top of it a hole of a convenient Bigness, at which you may cast in the Mixture, and presently stop it up again; this Vessel being fitted with a large Receiver must have Fire made under it, till the bottom of the sides be red hot, and then you must cast in the above prepar'd Mixture, by about halfe a spoonfull (more or less) at a time, at the hole made for that purpose; which being nimbly stopt, the Fumes will pass into the Receiver and condense there into a Liquor, that being rectifi'd will be of a pure golden Colour, and carry up that colour to a great height; this Spirit abounds in the Salt I told you of, part of which may easily enough be separated by the way I use in such cases, which is, to put the Liquor into a glass Egg, or bolthead with a long and narrow Neck. For if this be plac'd a little inclining in hot sand, there will sublime up a fine Salt, which, as I told you, I find to be much of kin to the Volatile Salts of Animals: For like them it has a Saltish, not an Acid Salt; it hisses upon the Affusion of Spirit of Nitre, or Oyle of Vitriol; it precipitates Corals Dissolv'd in Spirit of Vinager; it turnes the blew Syrup of Violets immediately green; it presently turnes the Solution of Sublimate into a Milkie whiteness; and in summ, has divers Operations like those that I have observ'd in that sort of Salts to which I have resembled it: and is so Volatile, that for Distinction sake, I call it Tartari Fugitivus [Errata: Sal Tartari Fugitivus]. What virtues it may have in Physick I have not yet had the opportunity to Try; but I am apt to think they will not be despicable. And besides that a very Ingenious Friend of mine tells me he hath done great matters against the stone, with a Preparation not very much Differing from ours, a very Experienc'd Germane Chymist finding that I was unacquainted with the wayes of making this salt, told me that in a great City in his Country, a noted Chymist prizes it so highly, that he had a while since procur'd a Priviledge from the Magistrates, that none but He, or by his Licence, should vent a Spirit made almost after the same Way with mine, save that he leaves out one of the Ingredients, namely the Quick-lime. But, continues Carneades, to resume my Former Discourse where your Curiosity interrupted it;

Tis also a common practice in France to bury thin Plates of Copper in the Marc (as the French call it) or Husks of Grapes, whence the Juice has been squeez'd out in the Wine-press, and by this means the more saline parts of those Husks working by little and little upon the Copper, Coagulate Themselves with it into that Blewish Green Substance we in English call Verdigrease. Of which I therefore take Notice, because having Distill'd it in a Naked Fire, I found as I expected, that by the Association of the Saline with the Metalline parts, the former were so alter'd, that the Distill'd Liquor, even without Rectification, seem'd by smell and Tast, strong almost like Aqua Fortis, and very much surpassed the purest and most Rectifi'd Spirit of Vinager that ever I made. And this Spirit I therefore ascribe to the salt of the Husks alter'd by their Co-Mixture with the copper (though the Fire afterwards Divorce and Transmute them) because I found this later in the bottom of the Retort in the Forme of a Crocus or redish powder: And because Copper is of too sluggish a Nature to be forc'd over in close Vessels by no stronger a heat. And that which is also somewhat Remarkable in the Destillation of good Verdigrease, (or at least of that sort that I us'd) is this, that I Never could observe that it yielded me any oyl, (unless a little black slime which was separated in Rectification may pass for Oyle) though both Tartar and Vinager, (especially the former) will by Destillation yield a Moderate proportion of it. If likewise you pour Spirit of Vinager upon Calcin'd Lead, the Acid Salt of the Liquor will by its Commixture with the Metalline parts, though Insipid, acquire in a few hours a more than Saccharine sweetness; and these Saline parts being by a strong Fire Destill'd from the Lead wherewith they were imbody'd, will, as I formerly also noted to a Different purpose, leave the Metal behind them alter'd in some qualities from what it was, and will themselves ascend, partly in the Forme of an unctuous Body or Oyle, partly in that of Phlegme; but for the greatest part in the Forme of a subtile Spirit, indow'd, besides divers new Qualities which I am not now willing to take notice of, with a strong smell very much other than that of Vinager, and a piercing tast quite differing both from the Sowerness of the Spirit of Vinager, and the Sweetness of the Sugar of Lead.

To be short, As the difference of Bodies may depend meerly upon that of the schemes whereinto their Common matter is put; So the seeds of Things, the Fire and the other Agents are able to alter the minute parts of a Body (either by breaking them into smaller ones of differing shapes, or by Uniting together these Fragments with the unbroken Corpuscles, or such Corpuscles among Themselves) and the same Agents partly by Altering the shape or bigness of the Constituent Corpuscles of a Body, partly by driving away some of them, partly by blending others with them, and partly by some new manner of connecting them, may give the whole portion of matter a new Texture of its minute parts; and thereby make it deserve a new and Distinct name. So that according as the small parts of matter recede from each other, or work upon each other, or are connected together after this or that determinate manner, a Body of this or that denomination is produced, as some other Body happens thereby to be alter'd or destroy'd.

Since then those things which Chymists produce by the help of the Fire are but inanimate Bodies; since such fruits of the Chymists skill differ from one another but in so few qualities that we see plainly that by fire and other Agents we can employ, we can easily enough work as great alterations upon matter, as those that are requisite to change one of these Chymical Productions into another; Since the same portion of matter may without being Compounded with any extraneous Body, or at least Element, be made to put on such a variety of formes, and consequently to be (successively) turn'd into so many differing Bodies. And since the matter cloath'd with so many differing formes was originally but water, and that in its passage thorow so many transformations, it was never reduc'd into any of those substances which are reputed to be the Principles or Elements of mixt Bodies, except by the violence of the fire, which it self divides not Bodies into perfectly simple or Elementary substances, but into new Compounds; Since, I say, these things are so, I see not why we must needs believe that there are any Primogeneal and simple Bodies, of which as of Pre-exsistent Elements Nature is obliged to compound all others. Nor do I see why we may not conceive that she may produce the Bodies accounted mixt out of one another by Variously altering and contriving their minute parts, without resolving the matter into any such simple or Homogeneous substances as are pretended. Neither, to dispatch, do I see why it should be counted absur'd [Transcriber's Note: absurd] to think, that when a Body is resolv'd by the Fire into its suppos'd simple Ingredients, those substances are not true and proper Elements, but rather were, as it were, Accidentally produc'd by the fire, which by Dissipating a Body into minute Parts does, if those parts be shut up in Close Vessels, for the most part necessarily bring them to Associate Themselves after another manner than before, and so bring Them into Bodies of such Different Consistences as the Former Texture of the Body, and Concurrent Circumstances make such disbanded particles apt to Constitute; as experience shews us (and I have both noted it, and prov'd it already) that as there are some Concretes whose parts when dissipated by fire are fitted to be put into such Schemes of matter as we call Oyle, and Salt, and Spirit; So there are others, such as are especially the greatest part of Minerals, whose Corpuscles being of another Size or figure, or perhaps contriv'd another Way, will not in the Fire yield Bodies of the like Consistences, but rather others of differing Textures; Not to mention, that from Gold and some other Bodies, we see not that the Fire separates any Distinct Substances at all; nor That even those Similar Parts of Bodies which the Chymists Obtain by the Fire, are the Elements whose names they bear, but Compound Bodies, upon which, for their resemblance to them in consistence, or some other obvious Quality, Chymists have been pleas'd to bestow such Appellations.



THE CONCLUSION.

These last Words of Carneades being soon after follow'd by a noise which seem'd to come from the place where the rest of the Company was, he took it for a warning, that it was time for him to conclude or break off his Discourse; and told his Friend; By this time I hope you see, Eleutherius, that if Helmonts Experiments be true, it is no absurdity to question whether that Doctrine be one, that doth not assert Any Elements in the sence before explain'd. But because that, as divers of my Arguments suppose the marvellous power of the Alkahest in the Analyzing of Bodies, so the Effects ascrib'd to that power are so unparallell'd and stupendious, that though I am not sure but that there may be such an Agent, yet little less than [Greek: autopsia] seems requisite to make a man sure there is. And consequently I leave it to you to judge, how farre those of my Arguments that are built upon Alkahestical Operations are weakned by that Liquors being Matchless; and shall therefore desire you not to think that I propose this Paradox that rejects all Elements, as an Opinion equally probable with the former part of my discourse. For by that, I hope, you are satisfied, that the Arguments wont to be brought by Chymists, to prove That all Bodies consist of either Three Principles, or Five, are far from being so strong as those that I have employ'd to prove, that there is not any certain and Determinate number of such Principles or Elements to be met with Universally in all mixt Bodies. And I suppose I need not tell you, that these Anti-Chymical Paradoxes might have been manag'd more to their Advantage; but that having not confin'd my Curiosity to Chymical Experiments, I who am but a young Man, and younger Chymist, can yet be but slenderly furnished with them, in reference to so great and difficult a Task as you impos'd upon me; Besides that, to tell you the Truth, I durst not employ some even of the best Experiments I am acquainted with, because I must not yet disclose them; but however, I think I may presume that what I have hitherto Discoursed will induce you to think, that Chymists have been much more happy in finding Experiments than the Causes of them; or in assigning the Principles by which they may best be explain'd. And indeed, when in the writings of Paracelsus I meet with such Phantastick and Un-intelligible Discourses as that Writer often puzzels and tyres his Reader with, father'd upon such excellent Experiments, as though he seldom clearly teaches, I often find he knew; me thinks the Chymists, in their searches after truth, are not unlike the Navigators of Solomons Tarshish Fleet, who brought home from their long and tedious Voyages, not only Gold, and Silver, and Ivory, but Apes and Peacocks too; For so the Writings of several (for I say not, all) of your Hermetick Philosophers present us, together with divers Substantial and noble Experiments, Theories, which either like Peacocks feathers make a great shew, but are neither solid nor useful; or else like Apes, if they have some appearance of being rational, are blemish'd with some absurdity or other, that when they are Attentively consider'd, makes them appear Ridiculous.

Carneades having thus finish'd his Discourse against the received Doctrines of the Elements; Eleutherius judging he should not have time to say much to him before their separation, made some haste to tell him; I confess, Carneades, that you have said more in favour of your Paradoxes then I expected. For though divers of the Experiments you have mention'd are no secrets, and were not unknown to me, yet besides that you have added many of your own unto them, you have laid them together in such a way, and apply'd them to such purposes, and made such Deductions From them, as I have not Hitherto met with.

But though I be therefore inclin'd to think, that Philoponus, had he heard you, would scarce have been able in all points to defend the Chymical Hypothesis against the arguments wherewith you have oppos'd it; yet me thinks that however your Objections seem to evince a great part of what they pretend to, yet they evince it not all; and the numerous tryals of those you call the vulgar Chymists, may be allow'd to prove something too.

Wherefore, if it be granted you that you have made it probable,

First, that the differing substances into which mixt Bodies are wont to be resolved by the Fire are not of a pure and an Elementary nature, especially for this Reason, that they yet retain so much of the nature of the Concrete that afforded them, as to appear to be yet somewhat compounded, and oftentimes to differ in one Concrete from Principles of the same denomination in another:

Next, that as to the number of these differing substances, neither is it precisely three, because in most Vegetable and Animal bodies Earth and Phlegme are also to be found among their Ingredients; nor is there any one determinate number into which the Fire (as it is wont to be employ'd) does precisely and universally resolve all compound Bodies whatsoever, as well Minerals as others that are reputed perfectly mixt.

Lastly, that there are divers Qualities which cannot well be refer'd to any of these Substances, as if they primarily resided in it and belong'd to it; and some other qualities, which though they seem to have their chief and most ordinary residence in some one of these Principles or Elements of mixt Bodies, are not yet so deducible from it, but that also some more general Principles must be taken in to explicate them.

If, I say, the Chymists (continues Eleutherius) be so Liberall as to make you these three Concessions, I hope you will, on your part, be so civil and Equitable as to grant them these three other propositions, namely;

First, that divers Mineral Bodies, and therefore probably all the rest, may be resolv'd into a Saline, a Sulphureous, and a Mercurial part; And that almost all Vegetable and Animal Concretes may, if not by the Fire alone, yet, by a skilfull Artist Employing the Fire as his chief Instrument, be divided into five differing Substances, Salt, Spirit, Oyle, Phlegme and Earth; of which the three former by reason of their being so much more Operative than the Two Later, deserve to be Lookt upon as the Three active Principles, and by way of Eminence to be call'd the three principles of mixt bodies.

Next, that these Principles, Though they be not perfectly Devoid of all Mixture, yet may without inconvenience be stil'd the Elements of Compounded bodies, and bear the Names of those Substances which they most Resemble, and which are manifestly predominant in them; and that especially for this reason, that none of these Elements is Divisible by the Fire into Four or Five differing substances, like the Concrete whence it was separated.

Lastly, That Divers of the Qualities of a mixt Body, and especially the Medical Virtues, do for the most part lodge in some One or Other of its principles, and may Therefore usefully be sought for in That Principle sever'd from the others.

And in this also (pursues Eleutherius) methinks both you and the Chymists may easily agree, that the surest way is to Learn by particular Experiments, what differing parts particular Bodies do consist of, and by what wayes (either Actual or potential fire) they may best and most Conveniently be Separated, as without relying too much upon the Fire alone, for the resolving of Bodies, so without fruitlessly contending to force them into more Elements than Nature made Them up of, or strip the sever'd Principles so naked, as by making Them Exquisitely Elementary to make them almost useless,

These things (subjoynes Eleu.) I propose, without despairing to see them granted by you; not only because I know that you so much preferr the Reputation of Candor before that of subtility, that your having once suppos'd a truth would not hinder you from imbracing it when clearly made out to you; but because, upon the present occasion, it will be no disparagement to you to recede from some of your Paradoxes, since the nature and occasion of your past Discourse did not oblige you to declare your own opinions, but only to personate an Antagonist of the Chymists. So that (concludes he, with a smile) you may now by granting what I propose, add the Reputation of Loving the truth sincerely to that of having been able to oppose it subtilly.

Carneades's haste forbidding him to answer this crafty piece of flattery; Till I shal (sayes he) have an opportunity to acquaint you with my own Opinions about the controversies I have been discoursing of, you will not, I hope, expect I should declare my own sence of the Arguments I have employ'd. Wherefore I shall only tell you thus much at present; that though not only an acute Naturalist, but even I my self could take plausible Exceptions at some of them; yet divers of them too are such as will not perhaps be readily answer'd, and will Reduce my Adversaries, at least, to alter and Reform their Hypothesis. I perceive I need not minde you that the Objections I made against the Quaternary of Elements and Ternary of Principles needed not to be oppos'd so much against the Doctrines Themselves (either of which, especially the latter, may be much more probably maintain'd than hitherto it seems to have been, by those Writers for it I have met with) as against the unaccurateness and the unconcludingness of the Analytical Experiments vulgarly Relyed On to Demonstrate them.

And therefore, if either of the two examin'd Opinions, or any other Theory of Elements, shall upon rational and Experimental grounds be clearly made out to me; 'Tis Obliging, but not irrational, in you to Expect, that I shall not be so farr in Love with my Disquieting Doubts, as not to be content to change them for undoubted truths. And (concludes Carneades smiling) it were no great disparagement for a Sceptick to confesse to you, that as unsatisfy'd as the past discourse may have made you think me with the Doctrines of the Peripateticks, and the Chymists, about the Elements and Principles, I can yet so little discover what to acquiesce in, that perchance the Enquiries of others have scarce been more unsatisfactory to me, than my own have been to my self.

FINIS.

* * * * *

The Authors constant Absence from the Presse, whilst the former Treatise was Printing, and the Nature of the Subject it self, wherewith ordinary Composers are not wont to be at all acquainted, will, 'tis hop'd, procure the Readers Excuse, till the next Edition, if the Errata be somewhat numerous, and if among them there want not some grosser mistakes, which yet are not the only Blemishes these lines must take notice of and acknowledg; For the Author now perceives that through the fault of those to whom he had committed the former Treatise in loose Sheets, some Papers that belonged to it, have altogether miscarryed. And though it have luckily enough happen'd, for the most part, that the Omission of them does not marr the Cohaerence of the rest; yet till the next design'd Edition afford an opportunity of inserting them, it is thought fit that the Printer give notice of one Omission at the End of the first Dialogue; and that to these Errata there be annex'd the ensuing sheet of Paper, that was casually lost, or forgotten by him that should have put it into the Presse; where it ought to have been inserted, in the 187. printed Page, at the break, betwixt the words, [Nature] in the 13th. line, and [But] in the next line after. Though it is to be noted here, that by the mistake of the Printer, in some Books, the number of 187 is placed at the top of two somewhat distant pages; and in such copies the following addition ought to be inserted in the latter of the two, as followeth.

And on this occasion I cannot but take notice, that whereas the great Argument which the Chymists are wont to employ to vilify Earth and Water, and make them be look'd upon as useless and unworthy to be reckon'd among the Principles of Mixt Bodies, is, that they are not endow'd with Specifick Properties, but only with Elementary qualities; of which they use to speak very sleightingly, as of qualities contemptible and unactive: I see no sufficient Reason for this Practice of the Chymists: For 'tis confess'd that Heat is an Elementary Quality, and yet that an almost innumerable company of considerable Things are perform'd by Heat, is manifest to them that duly consider the various Phaenomena wherein it intervenes as a principall Actor; and none ought less to ignore or distrust this Truth then a Chymist. Since almost all the operations and Productions of his Art are performed chiefly by the means of Heat. And as for Cold it self, upon whose account they so despise the Earth and Water, if they please to read in the Voyages of our English and Dutch Navigators in Nova Zembla and other Northern Regions what stupendious Things may be effected by Cold, they would not perhaps think it so despicable. And not to repeat what I lately recited to You out of Paracelsus himself, who by the help of an intense Cold teaches to separate the Quintessence of Wine; I will only now observe to You, that the Conservation of the Texture of many Bodies both animate and inanimate do's so much depend upon the convenient motion both of their own Fluid and Looser Parts, and of the ambient Bodies, whether Air, Water, &c. that not only in humane Bodies we see that the immoderate or unseasonable coldness of the Air (especially when it finds such Bodies overheated) do's very frequently discompose the Oeconomie of them, and occasion variety of Diseases; but in the solid and durable Body of Iron it self, in which one would not expect that suddain Cold should produce any notable change, it may have so great an operation, that if you take a Wire, or other slender piece of steel, and having brought it in the fire to a white heat, You suffer it afterwards to cool leasurely in the Air, it will when it is cold be much of the same hardnesse it was of before: Whereas if as soon as You remove it from the fire, you plunge it into cold water, it will upon the sudden Refrigeration acquire a very much greater hardness then it had before; Nay, and will become manifestly brittle. And that you may not impute this to any peculiar Quality in the Water, or other Liquor, or Unctuous matter, wherein such heated steel is wont to be quenched that it may be temper'd; I know a very skillful Tradesman, that divers times hardens steel by suddenly cooling it in a Body that is neither a liquor, nor so much as moist. A tryal of that Nature I remember I have seen made. And however by the operation that Water has upon steel quenched in it, whether upon the Account of its coldness and moisture, or upon that of any other of its qualities, it appears, that water is not alwaies so inefficacious and contemptible a Body, as our Chymists would have it passe for. And what I have said of the Efficacy of Cold and Heat, might perhaps be easily enough carried further by other considerations and experiments; were it not that having been mention'd only upon the Bye, I must not insist on it, but proceed to another Subject.



ERRATA.

Pag. 5. line. 6. read so qualify'd, 15. 19. Ratiocinations, 25. 15. for a, 33. 17. in a parenth. (that is no more), 51. 24. besides another Caput, 79. 10. employ, 86. 13. structure, 97. 13. Sack, ibid. 22. Sack, 104. 29. instead of appear it, will, leg. appear, it will, 118. 20. leasure, ibid. principal, 126. 20. and till it suffer, 129. 3. leg. in parenth. (notwithstanding, &c. 131. 15. so, 144. 15. [Greek: Synchysis], 151. 5. nor have been resolved, 180. 25. Magistram, 185. 15. lately, 188. 15. tunned, 200. 1. intolerable, ibid. 2. in, 209. 21. tegularum, 210. 7. distill'd from, 215. 25. dele the, 220. 1. bodies, 228. 11. [Transcriber's Note: 21.] fugitive, 231. 17. instead of all lege a pound, 237. 6. Chymist, 248. 18. Ashes off, 251. 23. Deopilative), 259. 6. it self, 269. 10. [Greek: ousia analogos], ibid. [Greek: astron stoicheio], 276. 25. make a parenth. at the words, by the, and shut it after the words in the 27. line at all, 280. 11. Corals, 288. 6. ascribes, 294. 22. porosity, ibid. 28. noted, 296. 1. Bodies, 305. 8. (attended, 307. 12. dele to, 308. 12. devisers, 312. 14. and, 313. 3. too, 314. 24. fugitivenesse, 333. 13. origine, ibid. 24. contrivance of, 339. 1. Nay, Barthias, 142. [Transcriber's Note: 342.] 3. in; I will, 350. 26. absurd, 356. 11. [Transcriber's Note: 21.] Goutieres, 358. 6. antea, 360. 1. compertissimum, ibid. 18. Joachimica, ibid. 19 graminis, ibid. 23. sua [Transcriber's Note: this appears to be correct on the original page 360], 362. 6. Dutch account, 363. 2. diggers), ibid. 11. and 12. lin. read damp as the Englishmen also call it, 366. 25. a height, 368. 19. in use, 370. 9. latter; And, ibid. 24. Water; I, 377. 22. Rest, ibid. 25. know), 378. 23. after Aggregate insert or complex, ibid. 27. dele ), ibid. 28. dele ), 379. 4. before as begin a parenth. which ends lin. 9. at Gold, ibid. instead of Which, put This, ibid. 12. with the word Texture should be connected the next line, Though, and this word Though is to have put before it a parenthesis, which is to end at the word Fluid in the 16th. line, 383. 3. Regulus Martis Stellatus, 382. 3. Relations, ibid. 9. Chymist, 386. 29. confesse by teaching it, 391. 8. and yet may, 392. 1. an, ibid. 12. of, 393. [Transcriber's Note: line 5] distinct Tasts, 397. 13. Talck, 398. 18. Earth, 399. 18. parts, 404. 8. sal-petrae, 419. 20. after it put in Sal.

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The Publisher doth advertise the Redaer [Transcriber's Note: Reader], that seeing there are divers Experiments related in this Treatise, which the Author is not unwilling to submit to the consideration also of Forraign Philosophers, he believes this piece will be very soon translated into Latin.

END.