The works of the highly experienced and famous chymist, John Rudolph Glauber

by Johann Rudolf Glauber

And two reasons chiefly moved me to insert this history, First, that it may appear how soon one may mistake in a small thing frustrating the whole process. Secondly, That the truth of the Philosophers may appear writing that gold by art is reducible into a lower degree, equal to lead (which happened to me in this work) and that it is harder to destroy gold and make it like to an Imperfect metal, than to transmute an imperfect metal into gold; therefore I am glad in my heart that I saw such an experiment; of which thing our phantastick Philosophers will hear nothing, writing whole volumes against the truth, stifly affirming, gold to be incorruptible, which is an arrant lye; for I can shew the contrary (if need be) many ways. I wonder indeed what moves such men to slight a thing unknown, I do not use to judg things unknown to me.

How dare they deny the transmutation of metals, knowing not how to use coals and tongs? truly I confess those rude and circumforaneous Mountebanks, not a little to defile and disgrace true Chymistry, every where cheating men by their fraud, being needy and opprest with penury; unless peradventure they find some credulous rich man giving them food and raiment for the conceived hope of Gain and Skill, of which also some being furnisht with gold, go clad like painted Parrots, whom I judg to be hated worse than a Dog or a Snake; but innocent Chymistry is not therefore to be despised. Some covetous men besotted with folly and madness, laying out their moneys with an uncertain hope of gain, who afterward the thing ill succeeding, are forced to live in poverty, whose case is not to be pityed, destroying their money out of covetousness. Some seek wealth not out of covetousness, but rather that they may have wherewith to live, and may search nature, which are to be excused if they are deceived by knaves, yet not to be praised if they spend above their ability.

Another tincture and medicine of Gold.

Dissolve gold in Aqua Regia, being dissolved, precipitate it with liquor of the salt of flints, pour some more of the aforesaid liquor to the precipitated gold, then place them in sand to boyl for some hours space, and the liquor of flints will extract the tincture of the gold, and be dyed with a purple colour, to which, pour rain water, and make it to boyl together with that purple liquor, and the flint will be precipitated, the tincture of an excellent colour with the salt of Tartar left; from which it is necessary to extract the water even to driness, and a very fine salt of a purple colour will remain in the bottom of the glass, out of which with the spirit of wine, may be drawn a tincture as red as blood, little inferior in vertue to potable gold; for many things lie hid in the purple salt, of which more things might be spoken if occasion permitted; therefore let it suffice to shew the way of destroying gold, for that golden salt may in a very short time, viz. an hour, be perfected with small labour and transmuted into a wonder of nature; confuting the slanders of the noble Art of Alchimy; for which gift we ought to give immortal thanks to the immortal God.

Of Looking-glasses.

I have made mention in the treatise of Aurum potabile, not only of the material heat of fire, but also of turning the finest beams of the Sun into a material bodily substance, by help of certain instruments by which they are collected. I have also mentioned there a concave Glass, whose preparation I will here give, it being not known to all men, the best that I know is as followeth. First, patterns are to be made of the best matter, namely, hair and Potters clay, of which thing in the Fifth part, conformable to the glasses, in form and figure circularly round; for else they cannot gather the Sun-beams together, and again put them forth; the fault of which thing is to be ascribed only to the pattern or mold; for the fusion and polishing of glasses is no singular Art, being known even to Bell-founders, but to melt them when very well shap’t of the best matter and rightly to polish them, this is Art: and first to cut the patterns round, being very well shaped by the use of a sharp Iron Instrument cannot briefly be demonstrated; therefore I will send the Reader to Authors prolixly handling this thing, viz. Archimedes and Johan. Baptist. Porta, and others; but if thou wantest those Authors, or dost not understand them, see thou have a Globe exactly turned for making the Molds as followeth: first make a mixture of meal and sifted ashes, which spread equally between two boards, as the manner is to spread past made of Flower and Butter for Pyes and Tarts, answering in thickness to the glass to be shaped, then with a Compass make a circle as big a you please, which cut with a knife, and put it on the Globe, and sprinkle quick lime on it out of a searce or sive, and put clay well prepared with haire over it of the thickness of two fingers breadth; and if it be a great piece you must impose cross wires strengthning the Mold, least it be bent or broken. Afterward one part being hardned with the heat of the Sun or fire, take away all that from the Globe, and put it on some hollow thing, on which it may on all sides stand well, and also sprinkle quick lime or the powder of coals on the other side, and put upon this the other part of the pattern, and again expose it by degrees, to be dryed by the heat of Sun or fire, lest it crack; which done, take away the ends making those parts of the Mold or pattern from the inward or middle, which ends set one against another to the inward parts, the distance at least of a hands breadth, and put between in the top a few live coals to harden the Mold all over; to which put on other coals, and then more, and so by degrees even to the top, that they may be well kindled in their lighter parts; but if the Molds are very thick, one fire will not suffice, but it will be necessary to add more coals, until they be throughly kindled in the inner parts; afterward, let the fire go out by degrees, that the types may grow cold, but not altogether, but so that you may touch them; and presently besmear finely the sifted ashes mixt with water, with a pencil, to stop up the chincks arisen from the burning the hair, and for smoothing the types; then again make both parts (after thou hast first framed a hole in them for a Tunnel) clean, being wary lest any foul thing fall upon them; and carefully bind them together with iron or copper wier; and very well lute over the joining with clay prepared with hair; and put on an earthen Tunnel, and place the Mold in dry sand up to the top: And thou oughtest in the mean while thou burnest and preparest the Mold, to melt the metallick mixture, that it may be poured into the hot Mold, the Metal being well melted, cast in a bit of searcloath, which burning, pour out the melted Metal into the hot Mold, being wary lest coals or some other thing fall into the crucible, and be poured with the Metal into the Mold, spoiling the glass; then let the glass cool of it self in the Mold, if the matter do not moulder in the cooling: And if it should moulder in the cooling, which indeed would lessen it, it behoves that the cast glass be presently taken out of the Mold, and covered over with a hot earthen or iron vessel, that it may cool under it, which otherwise, cooling shut up in the Mold not being able to moulder, is broke in pieces, but a little below you shall perceive, what be those mouldering metals.

And this is the common way (and the best) of melting, if so be thou art exercised; there are also other ways; first, when molds are made of wood or lead, agreeing to the glass, to be impressed with sand, or the finest powder of tyles or other earth, as is the custome of copper-smiths; and this way only serveth for lesser glasses.

The third way which is the best of all, but hardest to one not exercised, is as follows; make a waxen Mold with a Cylinder to be placed between two boards, as is aforesaid of the first way, which put upon the globe for to shape it, and let it be hardned in the cold; then take it away, and spread over it the following mixture with a pencil; which see that it be dryed in the shadow, then apply potters clay, prepared with hair, the thickness of one or two fingers breadth; then take away the wax in manner following from the earth: make a round hole in the earthen mold with a knife, coming even to the wax; which done, place it near a coal fire, the mold being bending down, and the melted wax will run through the hole, into which pour the hot (not burnt) metal, &c. that liniment which is anoynted on the wax must be very well prepared least while the wax melt, it fall and melt away with the wax, nor let the wax pierce the earthen mold and spoil it. Now the liniment follows: Burn potters clay well washt in a Furnace even to redness; afterward grind it and take away its finest part with washing of water, so that you may have an impalpable powder, which dry, and again burn with a strong fire: after grind it with rain water and salt Armoniack sublimed, upon a stone, as Painters use to prepare their colours, bring it to the just consistence of a paint, and the mixture will be made; the salt Armoniack keeps that fine powder, lest it melt away with the wax: and the prepared earth makes a tender and fine fusion.

The metallick mixture for the matter of the Looking-Glass.

There are divers of these mixtures, of which one is alwaies better than the other, which by how much ’tis the harder, by so much the glass is the better; and by how much the harder the metal is, by so much the better it is polisht; nor doth the hardness of the mixture suffice, but its whiteness is also required: for red proceeds from too much copper; black from too much iron, or duskie from too much tin, and doth not make the true representations of things, but changeth the shape and colour of them: for example sake, too much copper rendereth the Species redder than they are to be, and so of the rest; let therefore the metallick mixture be very white; but if burning glasses are to be made, it is no matter what colour it be of, if so be that the mixture be hard. I will set down one of the best, ℞. of Copper plates the thinest beaten to pieces one part, of white Arsnick a quarter part; first moisten the plates with the liquor of the salt of Tartar, and make a Stratum super Stratum, with plates and Arsnick powdred, by sprinkling this on them, until the crucible be filled; to which pour the oyl of Linseed, as much as sufficeth to cover the copper and Arsnick; which done put on the cover with the best lute, then place the crucible (the lute being dryed) in sand, so that only the upper part of the cover may stick out and administer fire by degrees, at first little; secondly somewhat stronger, till at length it be hot, that all the oyl may evaporate; in the mean time, the oyl will prepare the copper, and retain the Arsnick, and will make it enter into the plates, like oyl piercing dry Leather: Or place the crucible upon a grate and put Fire to it, which administer by degrees, until the oyl evaporate in the boyling. Lastly, when it shall coole, break the crucible, and thou shalt find the copper of diverse colours, especially if thou shalt take Orpin in stead of Arsenick, and twice or thrice increased in magnitude, and brittle.