gentle sand-heat It is esteemed better than t'other to be taken inwardly because it is less Corrosive being corrected by the Spirit of Wine the dose is from four to twelve drops in some liquor appropriate to the disease Remarks The Potters earth is mixed with the Salt to divide it into particles that the fire may the more easily be able to rarefie it for the parts which Salt consists of are so strictly united that the utmost force of fire is not able to disengage them until they are separated by some Intermedium The preparation that I give unto Salt before it is put into the Retort is longer than the common sort but I have observed that the Spirit comes forth with less difficulty when the matter is prepared according to this form You must leave a vacuity in the Retort and fit to it a large Receiver for giving liberty to the spirit to circulate before it dissolves otherwise it would break them both Likewise the fire must be encreased by little and little because the first Spirits do break out with a mighty violence when they are driven too hard Some ways of drawing the Spirit of Salt without addition have been much sought after but that is not yet well discovered It is true indeed Monsieur Seignette an Apothecary of Rochell among other excellent discoveries that he hath made on Salts to the knowledge of which he hath particularly applied himself brought me hither a sea-salt in the year 1672 that we distilled without addition of any thing else by a very moderate fire and in two hours time we drew three ounces and a half of very good Spirit out of six ounces of salt that we put into the Retort After this we broke the Retort and having powdered the Salt that remained in it to the weight of two ounces and a half we exposed it to the air in a pan for a fortnight and we found it reimpregnated with Spirits we distilled it once more and with the same ease as before we drew half its weight in Spirit of the same force as the former The matter remaining in the Retort being again exposed to the air recovered new Spirits Monsieur Seignette did assure me that he had thus drawn Spirit from the same matter nine several times which is a thing worth our admiration and shews us very well that the air contains a spirit which forms divers things according to the different disposition of the subjects that it enters into This salt is particular to him that shewed it me and he prepares it himself some way that he is unwilling to discover Since I writ of Monsieur Seignette's particular way of drawing spirit of salt some have Printed that if common salt well decrepitated and kept a good while over the fire were exposed to the air for some dayes and distilled without addition of any thing to it it would yield a spirit much like that I have spoken of and in full as great a quantity But if we examine the sharp liquor which is drawn this way we shall find it of so weak a nature that it may more reasonably be called phlegm than spirit and the salt remains entire in the Retort whereas M. Seignette's spirit of salt is full as strong as common spirit of salt and has the very same qualities nay I conceive it somewhat better as not having so great an impression from fire as the other Again some say it does not deserve the name of spirit of sea-salt nor ought this preparation to be look't upon as any great mystery because the same incorporation and augmentation happens to divers other salts exposed to the air after drawing off their spirit I grant this augmentation proceeds from the spirit of the air and I conceive it is the same spirit which produces all manner of things according to the Matrixes or different pores of the earth it uses to meet with as I have explicated in my Remarks upon the Principles But because this spirit of the air has met with pores in our matter ready disposed to make a salt much like unto common salt and a spirit is drawn from it much like unto that which is drawn from common salt I see no reason to doubt why this spirit should not be a true spirit of salt all the difference is this the salt I now speak of is not so throughly united to its earthy part as common salt is and therefore its spirits do separate with more ease for they are drawn without addition of any thing else and with a gentle fire whereas those of common salt are so fixt that they can't be driven out without mixing a great deal of earth in order to separate all its parts and without a very great fire As for the augmentation which happens to many other bodies exposed to the air after their spirits are drawn off I don't question the matter of fact nor that these same substances do return into what they were before by impregnating again with spirits of the air in some considerable time but it is rarely found that any of them do yield so strong spirits and so easily as our salt and herein lies the mystery It is observable that the acids which are drawn by so violent a fire do very much differ from those that are made naturally such as the Vinegars of Beer Wine Cider the acid of Citron c. The Spirit of salt among others hath some particular difference from the rest because it will precipitate that which Aqua fortis hath dissolved This acid according as may be judged by its effects is compounded of stronger and more weighty points than the rest but they are not so sharp and piercing And this is the reason that it jogs so effectually those of Aqua fortis loaded with some bodies they have dissolved and that shaking them about it makes them let go their hold Some have writ that this precipitation must not be imputed either to the weight or the strength no more than to the agitation which spirit of salt may have given to the Aqua fortis or to matters dissolved but rather to the conjunction of the acidity of this spirit with the volatile and sulphureous alkali of Aqua fortis or Spirit of Niter which does by that means constrain this last to abandon the metal which it had dissolved But this is the way to explicate as they say one obscure thing by another that is much more obscure for what likelihood is there that the volatile spirit of Aqua fortis is an alkali and pray how comes it to remain in so great a motion with the fixed acid spirit of this same water without destroying or losing its nature this is a thing that can never be conceived very easily But furthermore supposing this spirit were an alkali it would be still necessary to explicate mechanically for what reason this alkali does quit the body of the metal to betake itself to the Spirit of salt for to say meerly
that by the conjunction of these two spirits the Aqua fortis is compelled to abandon the metal that it had dissolved is nothing at all to the clearing of the question unless a man will needs give an intelligence to these spirits Wherefore we must still have recourse to the agitation and jostles for the true reason It is also remarkable that the effervescency which happens when Spirit of Salt is cast into the solution of some bodies by Aqua fortis is different from that which happens when some alkali is cast into it the former being much more gentle than the latter The Spirit of Salt dissolves leaf gold which Aqua fortis is not able to do When this Spirit is dulcified it is mixed with Spirit of Wine which being a Sulphur doth take off the edges of the acid and in part hinders their motion whence it comes to pass that this Spirit is milder by this addition than if water had been used instead of Spirit of Wine The Spirit of Salt may be made with Salt Decrepitated after the same manner CHAP. XVI Of Niter or Salt-peter IT is probable that the Niter of the antients was either the Aegyptian Natron or a salt that is found in the earth in a gray compact mass or else the natural Borax or the salt which is drawn from the water of the river Nilus and many other rivers And it may be that all these salts are divers kinds of their Niter but the Niter of the moderns is nothing else but Salt-peter and this is that of which I intend to speak Niter is a Salt impregnated with abundance of Spirits out of the air which do render it volatile it is taken from among the stones and earths of old ruined buildings Some of it is likewise to be found in Cellars and several other moist places because the air doth condense it in those places and easily unites with the stones Salt-peter is also sometimes made by the Urine of Animals falling upon stones and earths Nay some have thought that all Salt-peter comes from that cause whereas we see every day that some of it is taken out of places where there never came any Urine at all This salt is half volatile and half like unto Sal Gemme as I shall prove hereafter The great and violent flame which happens so soon as Salt-peter is flung upon the coals and the red vapours which it uses to yield when reduced into a spirit have induced the Chymists generally to believe that this salt is inflammable and consequently fully loaded with Sulphur because Sulphur is the only Principle that flames but if they had suspended their judgments herein until they had got more experience on this Subject they would not only have known that Salt-peter is not at all inflammable in its nature but they would e'en have doubted whether or no any Sulphur does enter into the natural composition of this salt for if Salt-peter were inflammable of it self like Sulphur it would burn where there is no Sulphur for example in a Crucible heated red-hot in the fire but it will never flame therein use what quantity of it you please and let the fire be never so great It is true indeeed if you throw Salt-peter upon kindled coals it makes a great flame but this is only through the sulphureous Fuliginosities of the coals which are violently raised and rarefied by the volatile nature of Niter as I shall prove in the Operation upon fixt Niter As for any Sulphur that is thought to be contained in Salt-peter it can't be demonstrated by any Operation whatever for the red vapours that come from it are no more inflammable than the Niter when they are not mixt with some Sulphureous matter and it is far more probable that this salt contains no Sulphur if we consider its cleanness transparency acidity and cooling quality which have no manner of affinity with the effects of Sulphur which are commonly to make a body opake to take off acidity and to heat Purification of Salt-peter To purifie Salt-peter is to deprive it of part of its fixt salt and of a little bituminous earth which it contains Dissolve ten or twelve pounds of Salt-peter in a sufficient quantity of water let the dissolution settle and filtrate it then evaporate it in a glass or earthen vessel to the diminution of half or until there begins to appear a little skin upon it then remove your vessel into a cool place stirring it as little as may be and leave it there till the morrow you 'l find Crystals which you must separate from the liquor evaporate this liquor again to a skin and set the vessel in a cool place to get new Crystals repeat the evaporations and Crystallizations until you have drawn all your Salt-peter Note that in the last Crystallizations you 'l have a Salt altogether like unto sea-salt or Sal Gemme keep it apart it may serve to season meat with The first Crystals are the pure Salt-peter You may if you please dissolve and purifie Salt-peter several other times in water observing every time what I said before for to render it more white and purifie it from its Sea-salt Salt-peter purified is a great aperitive it cools the body by fixing the humours that are in too much motion and drives them by Urine It is given in Feavers in Gonorrheas and many other diseases the dose is from ten grains to a drachm in Broth or some appropriate liquor Remarks The first Purification that is given to Salt-peter is this the stones and earths that contain it are grosly powdered they are boiled in a great deal of water to dissolve the Salt-peter the dissolution is filtred and then poured upon ashes to make a Lixivium after it hath been poured upon the ashes several times it is evaporated and Crystallized The salt of the ashes which does mix with the Salt-peter increases its fixt part but that which is made without ashes is the better to make Aqua fortis with The earth from whence Salt-peter hath been drawn being set in the open air and stirred about from time to time doth re-impregnate with a kind of Salt The long Crystals that we see Salt-peter shoot into do proceed from its volatile part for that which is Crystallized last is fixt like sea-salt and looks just like it Salt-peter can never be purified so well but it will still contain a salt like unto Sal Gemme or sea-salt but in less quantity than before When Salt-peter is boiled a long time in water and over a great fire some part of the Spirits do fly away and there remains at last nothing but a salt like unto sea-salt or Sal Gemme which serves to prove that Salt-peter is only a Sal Gemme fuller of Spirits than the other as I said speaking of the Principles When you would Crystallize a Salt you must dissolve it in a convenient proportion of water for if there should be too much the salt would be weakned too much and
them which is capable to make them petrifie but the great agitation they are in whilst they run with rapidity down mountains does hinder their coagulation for that can never happen until these waters have fallen into some place fit for them to repose and lye still in Calcination of Flints This operation shews the way to open the bodies of Flints and Crystal so that thereby they may be easily reduced into a powder Heat red-hot some Flints in the fire and quench them in water repeat heating and quenching them three or four times or until they are friable and can be finely powdered you must chuse River-Flints that are full of veins of several colours Crystal is Calcined after the same manner but it is more easily made friable than Flints A liquor and Tincture may be likewise drawn from it the same way I am going to shew for Flints their virtues likewise are both alike Tincture of Flints This operation is an exaltation of some parts of Flints and salt of Tartar in spirit of wine Mix well four ounces of Calcined Flints finely powdered with four and twenty ounces of Calcined Tartar put this mixture into a large Crucible cover it and place it in a wind-furnace light a fire about it by little and little to warm it gently and then encrease it to the last degree Continue it in this condition for five hours that the matter may all the while remain in Fusion Thrust a Spatule into it and see if your matter begins to grow diaphanous like glass If it doth so pour it into a warm Iron mortar and it will presently congeal into a hard mass which you must powder while it is hot and put into a matrass very dry and hot pour upon it Spirit of Wine Alcoholized four fingers above the matter stop your matrass close with another whose neck may be received into that which contains the matter Lute the conjunctions well with a wet bladder and set it in sand give a fire under it that is strong enough to make the Spirit of Wine simper for two days together it will turn of a red colour unlute your matrasses and separating them a-sunder decant the Tincture into a bottle put new Spirit of Wine to that which remains and digest it as before separate the liquor that is turned red and mingling it with the former pour it all together into a glass body and cover it with a head fit to it a Receiver and lute the junctures distil in a vaporous bath two thirds of the Spirit of Wine that may serve for use as before then take your vessel off the fire and keep that which remains in the bottom of the body in a Viol well stopt This Tincture is said to be a good remedy to open obstructions they use it for the Scurvy and in Hypochondriacal cases the dose is from ten to thirty drops in some proper liquor Remarks The Calx of Flints doth so strictly incorporate with the Salt of Tartar by the Calcination that they may be said to be converted into a Salt and this I shall shew in the following operation You must use the Spirit of Wine highly Alcoholized otherwise you will not gain the Tincture you must likewise observe to infuse the powdered matter while it is as hot as may be two thirds of the Spirit of Wine are distilled off that what remains may be the redder and stronger Almost all Chymists will needs make this red colour to proceed from the Sulphur of Flints extracted by the Spirit of Wine but it is more probable that this colour proceeds from an exaltation of the alkali salt in Spirit of Wine because a like Tincture is made on Salt of Tartar Liquor of Flints This operation is a solution of Flints into a liquor by the means of Salt of Tartar Take the other part of your Flints Calcined with Tartar and set it in a Cellar in a glass-pan it will dissolve into as clear a liquor as water Filtrate and so keep it This liquor is said to be Diuretick it is given from six to five and twenty drops in some convenient liquor If you mix an equal part of this liquor with some acid Corrosive Spirit you 'l presently turn it into a stone Remarks The Salt of Tartar or the gravell'd Ashes have so attenuated the Flint that it becomes as soluble as they and we see the truth of this in the operation for the moisture of the Cellar entring into the pores of our Calcined matter dissolves it imperceptibly and if this dissolution should be evaporated an alkali Salt is found at bottom When this liquor is mixed with an acid Spirit an Ebullition presently happens from the acid Spirits piercing the alkali and afterwards a stronger Coagulation is made then when an acid Spirit is poured on the Oil of Tartar because this same alkali contains more earth than does the Salt of Tartar This liquor may dissolve some Sulphureous obstructions that now and then happen and then it provokes Urine but if it meets with an acid humour it causes a Coagulation that may turn into a stone wherefore I would not advise any body to use this Remedy no more than the former Tincture which works only by its Salt that is mixed with the spirit of Wine From the Coagulation of these liquors may be sensibly explicated how stones come to be formed in several parts of our bodies seeing acid liquors and alkalis do so aften meet within us The Tincture of Flints is used to extract the Sulphur of many Minerals Alchymists have given it no less than the name of Alkahest CHAP. XIII Oil of Bricks THis preparation is Bricks impregnated with Oil of Olives and afterwards distilled Heat red-hot among burning Coals pieces of Brick and quench them in a pan filled half full with Oil of Olives but take care to cover it immediately for the Oil will else take fire Leave them in Infusion ten or twelve hours or until the Oil hath sufficiently penetrated the Bricks after that separate them and when you have grosly powdered the Bricks imbibed with the Oil put it into an earthen Retort or glass one luted large enough for a third part to remain empty place it in a Reverberatory furnace and fit to it a large capacious Receiver lute well the conjunctions and give a little fire at first to warm the Retort then encrease it by degrees until you see vapours come forth then continue it in this condition till there comes no more unlute the conjunctions and take away the Receiver there remains in the Retort all the Brick which you must fling away as useless Mix the Oil that remains in the Receiver with a sufficient quantity of other Brick dried and powdered and make a paste of it form several little pellets and put them into a glass Retort set the Retort in Sand and fitting to it a large Receiver and luting them together give a fire by degrees to rectifie all the Oil pour it into a
writ that if Aqua Regalis dissolves Gold and cannot dissolve Silver the reason of it is that the gross points of spirit of Niter or Aqua fortis are subtilized by the mixture of sal Armoniack and are rendred fit to enter into the small pores of Gold whereas the delicate Fabrick of these same points does not leave them the necessary strength nor motion to divide the parts of Silver whose pores are a great deal bigger But this way of arguing does not agree with experience for what likelihood is there that the points of spirit of Niter are so subtilized by the penetration and division of the parts of sal Armoniack or where shall we find any example that after a considerable effervescency of two salts met together in conflict the acidity grows sharper than it was before this is a thing that can never be proved On the contrary every body knows well enough that no effervescency happens but the acid is in part blunted or broken thereby Moreover the Argument supposes that spirit of Niter does break its subtilest points in violently contending with the Sal Armoniack since also that in sal Armoniack there are alkali salts whose property it is to destroy acids I could further add here that the conjunction of salt with spirit of Niter should of necessity render its points more gross than they were and that the Crystals which are drawn by aqua Regalis have their shape not so keen as those that are drawn by aqua Fortis But that which I have said is so probable in itself and so easie to be convinced of if a man takes never so little pains to consider it that I should but amuse my Reader to little purpose if I should offer to give any proofs of it Neither do I find it convenient to make a long discourse in explicating how Silver which has lesser pores is more susceptible of the impressions of Air and Fire than Gold which has larger seeing I have already supposed that the matter intercepted between the pores of Gold is more compact and consequently more hard to separate than that of Silver Volatile Spirit of Sal Armoniack This preparation is a volatile salt raised from sal Armoniack by the means of Quick-lime and dissolved into a liquor Take eight ounces of sal Armoniack and four and twenty ounces of Quick-lime powder them apart and when you haved mixed them in a mortar pour upon them four ounces of water and put it quickly into a Retort whose half must remain empty Set your Retort in a sand Furnace and fitting to it a great Receiver and luting the junctures exactly begin the distillation without fire for a quarter of an hour afterwards increasing it by little and little unto the second degree continue it until nothing more comes forth take off your Receiver and pour out the Spirit immediately into a Viol turning away your head as much as may be to avoid a very subtile vapour that continually rises from it Stop the bottle close with wax to keep the Spirit in you will have of it five ounces and six drachms It is an excellent Remedy for all diseases that proceed from Obstructions and corruption of humours such as Malignant feavers the Epilepsie Palsie Plague Small-pox c. It drives by perspiration or by Urine the dose is from six drops to twenty in a glass of Balm or Carduus water Remarks Quick-lime which is an alkali destroys the strength of the acid Sea-salt which in a manner bound up the volatile salts in the Sal Armoniack whence it comes to pass that as soon as Lime and Sal Armoniack are mixed together there exhales an unsufferable smell of Urine for the volatile salts coming forth abundantly do so fill the Nose and Mouth of the Artist that he would never be able to put the mixture into the Retort if he did not take good care to turn away his head while his hands are at work Water is added to it to liquifie these volatile salts for if there were nothing to moisten them they would suddenly sublime to the neck of the Retort and stopping it all together would break it to pieces You must stop the Retort with your hand so soon as you have poured the water into it and shaking it one minute you must hasten all you can to fit to it the Receiver and to lute well the junctures for the Quick-lime does presently grow hot so soon as its body is opened and this heat which is very considerable would spend the more volatile of the salts if there were no care taken to preserve them The Quick-lime being wetted does swell and take up a great deal of room wherefore the Retort must be filled but half full that there may remain room enough for the Spirits to rarefie in you must also use a large Receiver in which the vapours that rise in abundance may be able to circulate with ease This Spirit is nothing but a solution of volatile salts in water if you would sublime and separate it from the water you must put the liquor into a matrass with its head and proceed as I shall shew when I describe the volatile salt of Vipers but this salt being dry flies away more easily than when it continues dissolved in water so that it were better keep it as it is This is a stronger Spirit than that which is prepared with Salt of Tartar because the little fiery bodies of the Quick-lime which are mixed with it have quickned the motion of the volatile salts likewise these fiery particles are they that do hinder the coagulation of this Spirit with spirit of Wine when they are mixed together for there must be a cohaesion and repose of parts in order to make a Coagulum You must also have a care when you remove the Receiver not to hold your head over it for this volatile salt suffering a greater separation than before enters the Nose immmediately and hinders Respiration insomuch that several persons have been seen to fall in a swound by that means alone Now to avoid this accident you had best have ready a wet cloth to stop the Receiver with so soon as it is unluted This Spirit is an excellent Menstruum to make precipitations with it destroys acids exceeding well as do all other volatile alkalis it is used to precipitate Gold after it is dissolved It is good in those diseases I named because it opens the pores and drives the humours by perspiration or by Urine according to the disposition of bodies moreover as it is an alkali it destroys the acids which caused these diseases Again it sometimes causes sleep because it dulls the keenness of acid salts which entring into the little conduits of the Brain do cause perpetual watchings It is better give volatile Spirits in Sudorifick waters than broth because the broth being taken hot the heat would evaporate the better part of the volatile Spirits before a man could reach the Porringer to his mouth You