The fourth book

Tbe fourth <Book therein is fbown the true way to make glass of Lead 9 to calcine Leaf and extract from it the colours of green Eme. raid, Topa^, Afye colour or rcen, (franat colour,
' Saphyre, (fold bellow , and cf Lapis lazuli.
With the way to colour natural Cryftal (without melting it J into the perma¬nent colours of Rubies ,B alas*Top az,* Opalfjira\ole,& other fair colours.
L ; CHA P. LX I.
He glafs of Lead known to few in this Art, as to colours, is the faireft and noblcft glafs of all others at this day made I o 6 The fourth Book.
in the furnace. For in this glafs the co¬lours imitate the trurOriental gems, which cannot be done in Cryftal, nor any other glafs. ’Tis very true, that unlefs very great diligence be ufed, all forts of pots will be broken , and the metall will run into the coals of the furnace. Obferve my rules in all thefe glaftes made of Lead exa&iy, and you fhall avoid all danger. This bufinefs principally confifts in knowing well how co calcine Lead, and to recalcine ic alfo a fecond time; For by how much ’tis better and more calcined, by fo much the Jefs ic returns to Lead; Again,and by confequence the lefs breaks out the bottom of the pot. Secondly, caft the metall into water, and feparate carefully the Lead from the glafs, even the leaft grains of it. This glafs of lead muft be caft into the water by lit¬tle and little, to make a better feparation, for the leaft Lead remaining breaks out the bottom of the pots, and lets all the me- tallrun into the fire.
Thefe two r tiles our Author repeats almoft in every Chapter of this Book, and thefe following alfo, The pots and Lead muft not have too much heat in the furnace, neither muft the metall metall be wrought too hot, and the MarbJe whereon ’tis wrought mull be of the hardeft ftone,and mult be wetted , elfe the marble will break and fcale.
To calcine Lead.
CHAP. LXII.
A T firft Calcine Lead in a Kil as the potters do, and in great quantity. U- fually in two days they calcine many a hundred pound ot Lead. In calcining ob- ferve that the Kil be not too hot, but fuf- ficicntly heated onely to keep the Lead in fufion, for otherwile ’twill not be calcin’d. When the Lead is melted it yields at the top a Yellowilh matter. Then begin to draw forwards the calcined part with an Iron fit for the purpofe, always fpreading it in the internal extremity of the Kils bottom, which fhould be of foft-ftone, which will bear the fire. And the Kil muft have a declivitie towards the mouth, which 1 pals by as a thing well known. When tis calcined once it muft be put,and ipread spread a second time in the Kil, to rever¬berate in a convenient neat, always stirring it with an Iron, and that for many hours, till it come this second calcination to a good Yellow and be calcined. Then serce all in a fine scrce, and what passeth not the ferce recalcine it with new Lead. This is the way to calcine Lead in great quantity to make thereof store of Porters ware.
To make glass of Lead.
CHAP . LXIII.
T Ake of this calcined Lead 15 pound, and Crystall or Rocbetta or Polverine Fritt, according as you would make the colours, 12 pound, mix them as well as possibly you can, put them in a pot, and at the end of 10 hours,cast them into water, for by that time they will be all well melt¬ed, separate the Lead, and return the me¬tall into the pot, which in 12 hours at most you shall have most fit to work.
The 
The manner how to work. the faid ghfs.
CHAP. LX IV.
yO wcrk glafs of Lead into divers drink- • ing or other vetfeis, ’tis necetfary before 'tis taken upon the Iron to be a little raifed in the pot, and then take it out, and fuffer it to cool a little, and then work it on the Marble being clear. At firft let the Mar¬ble be well wetted with cold water that this glafs may not draw away with it the Marble, and fcale it; which it always doth when the marble is not wetted, and incor¬porates it into its felf. This flicking of the marble makes a foul colour in the works. Wherefore continually wet the marble whiles this glafs is wrought, otherwife all the fairnefs and beauty will be taken from it, Do thus as often as you take the metall out of the pot.This fort of glafs isfo ten¬der, that if it be not cooled m the furnace, and taken a little at a time,and held on the Irons, and the Marble continually wetted,
US
’tis impoflible to work it. Which pro¬ceeds from the calcined Lead, which makes it moft tender as a caudle.
Glafs of Lead of a wonderful Eme¬rald colour.
CHAP. LXV.‘ J
‘ I *Ake of Polverine Fritt 20 pound, Lead calcined 16 pound, ferce thefe two powders firft by themfelves, then, when well mixed, put them in a pot not too hot, and at the end of 8 or 10 hours they will be melted, then caft them into water, and feparate the Lead. Put them a fecond time into the pot, and in 6 or 8 hours they will be melted , then caft them into water and feparate the lead. This being twice done the metall will be freed from
all the Lead, and all the un&uofity which calcined Lead and Polverine give it, and will acquire a moft bright and fhining co¬lour, and in few hours ’twill run and be¬come very clear, then give it brafs thrice calcined (made as in Chap. 28.) fix oun-
CCSj
The fourth Book. 111
ces, and therewith mix a peny weight of Crocus <JMartis made with Viniger, put in this mixture at fix times, alwayes mixing well the glafs, and taking at each time the intervall of faying the Creed. Let this glafc fettle an hour, then mix and take a proof thereof. When you like the colour let them incorporate 8 hours,thcn work them into drinking glaflcs, which will appear in a colour proper to the Emerald of the old Oriental rock, with natural fhining and glittering.
Let this glafs ftand in a pot when fuffi- cientlv coloured, till ic hath conlumcd all the dregs, and till it be pcrfedly refined, and then ’twill be fo like the natural E- raerald that you canhardly know one from the other.
Another [Another wonderful Green Emerald merald-green, in Chap. 65. but with this difference, that this onely takes fix ounces of the powder of the Caput mor- tuum of Vitriolum Veneris, made as in Chap. 131.132. and the other the r—“ quantity of Brafs prepared. This ha is the rareft Green that can be madi way whatfoever, which I have often to my content. 
Topaz, colour in glass of Lead.
CHAP . LXVII.
T
Ake Crystal Fritt instead of Polverine Fritt 15 pound, Lead calcined 12 pound, mix and serce them both together, let them in the furnace not too hot, at the end of 8 hours, cast them into water, se¬parate the Lead from the pot and glass, and repeat this twice, then hereto add half glass of a Gold Yellow colour, let them incorporate, and purifie for an Oti- ental Topaz.
Sky or Sea-green in glass of Lead.
CHAP . LXVIII.
T Ake Crystall Fritt 16 pound, Lead calcined 10 pound, mix and serce them well together, set them in the furnace, in I 12 12 hours the fluff will be melted, caft both it and the pot into water, feparate the lead , let them ftand in the furnace 8 hours a fecond time , then caft them into water a fecond time, and feparate the lead, put them in the furnace , and in 8 hours your metall will be moft clear, then take of Brafs calcined 4 ounces, of Zaffer pre¬pared a quarter of an ounce, mix thefe well, and put in this mixture at 4 times to the glafs of lead, and at the end of two hours mix well the glafs and take a proof, then let the glafs ftand 10 hours, in which time the colours will be well incorpora¬ted, and the glafs be very well perfected, and be fit to be wrought in any works.
The colour of a Granat in gjafs of Lead.
CHAP. LXIX.
Mix 20 pound of Cryftall Fritt with 16 pound of calcined lead, fercc and put them into a pot, and to them of Mauganefe three ounces, of Zaffer half an ounce, both prepared, let them ftand 12 • . hours 
hours, cast them into water and separate the lead, put them again into the furnace, and let them purifie 10 hours, then mix them, and take a proof, when the colour is perfect, and of a fair Granat, work the glass as before.
Saphyre colour in glass of Lead.
CHAP . LXX.
T Ake 15 pound of Crystal Fritt, and lead calcined 12 pound, mix and serce them well together, then add to them two ounces of Zaffer, and of Manganese a peny weight, both orepared, let them stand in the furnace 12 hours, cast them into Water, and separate the lead, repeat this a second time, and you shall have the co¬lour of an Oriental Saphyre, very beauti¬ful and fair, with the mixture of a double Violet colour.

A Tellow Gold colour in Aafs of Lead.
CHAP. LXXI.
■y Ake of Cryftall Fritt, and calcined lead, of each 16 pound, mix and fercethcm well, and add to them of Brafs thrice burn¬ed fix ounces, Crocus Afartis made with Vinegar 2 peny weight, put them well mix¬ed in the furnace, let them ftand 12 hours, then caft them into water,feparate the lead, let them in the furnace-other 12 hours, and in that time ’twill be clear, mix them and take a proof. If it wax green, give it a little Crocus Afartis ( which takes away the greenefs> till it become a moft fair Gold Yellow colour, often made by me.
The colour of Lapis Lazuli.
C H A P. LXXII.
"K ,§Elr the faireft Lattimo made, as Tv j. in Chap. 55. with the whiteft Cry¬ftall and moft tender, in a pot, when ’tis well well melted , give it of Blew Painters Smalts., by little and little, and when the colour is good, lee it ftand in the fire two hours, and make a proof, and when tis good let it ftand 12 hours, mix them, and work them. If the mctall rife put in a piece of leaf Gold to diminifh the ri¬ling. This will be very like the natural Lapis Lazuli.
The way to colour natural Cryjial of a Viper colour* without melting it.
CHAP. LXXIII.
37Akc natural Cryftal of a good water, and very clear, free from Terre ftriety, in feveral pieces of divers Magnitudes, crude Antimony,Yellow Orpimentof each powdered two ounces, fal Ammoniac one ounce, powder and mix well thefe three Lift, put this mixture in the bottom of a Cryliblc that wiil bear the fire, and above this mixture the Cryftalls in pieces, then cover this Chrvfiblc with another, mouth 1 3 to to mouth, lute thc-m well, and when they nre dry, fet them in coals, which kindle by little and little,and when they begin to fire, kt them flame of tl emfelvcs, and then they will fmoakmuch, do this operation in a large Chimney, and avoid- the dan-gerous and deadly fumes, when all thefe fumes are ?onc , let the Chrvtibie ftand till the pot cool, and the lire go oucof its felf. Then unlutc the Chrylibles, and take out the pieces of Cryftal, and thofe which are at the top will be tinged with a good Yellow colour, with a'red Rubic, and Balafs colours with fair fpots, thofe which lay at the bottom upon the powder, and the rcfidcnccjnto the Wavie colour of a Viper. Thefe pieces of Cryftall may be wrought as Jewels at the wheel, and will receive a good pointing, luftre and (hew¬ing beauty, fuch as is in the Topaz,Rubic and Balafs, if vou give them foils fuuable to their colour they make a fair thew, oc- ing fet in Gold. Of thefe Cryftalls you may colour a good quantity » flnee the charges and 'abcur is hut lmall, and in co- louring a competent quantity there always come forth fome beautiful and fair.
The
The colour of a Balass, Ruble, Topaz, Opal, and Girasole in Na¬
tural Crystall.
CHAP . LXXIV.
T Ake Orpiment of a Yellow-oringe- tawney colour in powder, Crystalline white Arsnic, of each two ounces, crude Antimony,sal Armoniac,of each one ounce, put this powder well mixed, into a very capacious Chrysible, and upon the pow¬der, scales, and little pieces of Crystall, and upon these small pieces larger and grosser pieces of Crystall of a fair water, without spots, if you would have a plea¬
sing thing, let them be very large. And so fill the Chrysible, to which lute well ano¬ther mouth to mouth, make a hole at the bottom of the uppermost of the bigness of a Tare, that the air may draw thorow this hole the fumes of the materials which pass thorow the pieces of the Crystal.
I 4 Which
Which tingeth the Cryftall well, and bet¬ter than when they pafs thorow the jcynts of the Chryfiblcs. When the lute is dry¬ed, fit them in the coals, fo that all the lower moft, and half the uppermoft be buried in the coals. Then kindle the fire by little and little , do as in the former, and avoid the deadly fumes. The ma¬terials fume long , keep conftantly a ftrong, and good fire. See you let not in any wind or cold air by windows or other places , for the pieces of Cryftall being then hot, will become brittle, will fplit, and not be good. When the fire is gone out of it’s felf, unlutc the Chryfiblcs, and you fhall find the greateft part of the Cryftall tinged with the true colours of Topaz, Chryfolitc, Balafs, Rubies,Gira- folc, and Opal with wonderful beau¬ty. Thole ot the beft colour may be wrought by the Jewellers, at the wheel, and appear natural jewels , and the Crvflall holds it s natural hardneIs, which is gtcar. At Antwerp 1 made good ftorc,and amongft them,fome of them were of a fair Opal colour, and feme of the Girafolc.You may fet them in Gold with feilcs. Be fure 
furc the Orpiment be good , for therein confifteth all the fectcr. If the work pro¬ceeds not well the firft time, repeat it a fecond, and with pradicc you fliall always
do it without failing.
c
.
The
*
The fifth Eoofi Wherein is fhown the true way to mafc pafh for Emeralds Eop as Cbryfàlitc, Ia.cintb^ Saphyre, (farnat, Eynarinc, and other colours j of fo much plcafant- nefs and beauty 0 that they furpafs the fame natural ftoncs in all things 5 except bardnefs.
H’lth a new Chymical wjj ÇncDer yet vjeef) to make the faid pafs,taken out of lii2C Hollaildus^z/rf far excel¬ling all other pa fis that haVcbecn hi¬therto made, both in beauty & colour.
CHAP. LXXV.
I Eelicve there arc few who defire, and feck not with all earneftnefs the know¬ledge
ledge to imitate perfectly Emeralds, To¬
paz, &c. And in a manner all sorts of Jewels, which in colour, splendor, plea¬
santness and clearness, excepting hardness, excel the natural and Oriental, a thing ve¬ry delightful and pleasant.
Wherefore in this present Book I de¬scribe the means to make them, with the circumstances and diligence necessary to be used. There is no doubt but he who shall set himself to the work with dili¬gence, shall do much more than what I publish. The way lately practised by me, and taken from Isaac Hollandus, maketh pasts of incrcdible, and seemingly impos¬sible beauty and perfection. 'Tis true the work is somewhat long and wearisome, yet I that have many times performed it, say 'tis very facil and plain, and (that which is above all) this way is true. Wherefore all pains, expences, and char¬
ges employed in such a like work, ought to seem small and light.
The
The way to prepare natural Cry fall.
CHAP. LX XV I. |
TAkc natural Cryftall the clcareft that is poftible,and put bv fireftones, Cal- cidonies, and Tarfo and other hard (tones, which though they Vicri fie, yet they make not fo clear, lucid and fhining ftoncs as na¬tural Crvftal doth. The faid ftoncs ufed to make counterfeit Jewels, though they take polifhing wonderfully, yec they al¬ways have fomething earthy, and obfeure in them. But Cryftall hath always fome¬thing, that’s aerial and tranfparcnt, and draweth near to the quality and nature of Jewels, efpecially thofc which are natural and Oriental. For they work far greater cffc&s than the Italian or Dutch. Take then works made of Cryftal, put them in Chrvfiblcs covered a: the top, fee them in burning coals till they be both well heated & tired,then fuddcnly caft the Cryftall into a very large pan, full of cold clear water.When the Cryftal is cold recal- cihe cine, and heat, and cast it into fresh clean water, repeat this 12 times, and be sure the ashes and filth be kept out of the Chrysible, and that the water be always ve¬ry clean. When the Crystal is well cal- cin 'd grind it to an impalpable powder as fine as the best wheaten flour, and that on a Porphyrie-stone, with a muller of the same, and then 'twill crumble and come to a flour, like refined sugar. If you pow¬der the Crystall in Brass mortars, with an Iron Pestle, you can make nothing there¬
with but a green Emerald colour. Grind not above a spoonful at a time, and this grinding and sercing must be often repeat¬ed, so long till no roughness remains, nor can be felt in the powder. For otherwise a past made thereof will give onely a durty and imperfect work, and will never be like natural Jewels. But if the Crystall be well ground 'twill make artificial gems, far excelling true natural stones in beauty, colour, clearness, splendor and po¬lishing. Make a good quantity of this ma¬terial that you may make all colours, for
this is the prime material to make all Arti- ficiall jewels, and shall be called hereafter Crystal prepared.
These rules often repeated by the Author take together.
1. That the whole be done cleanly, to this end lute all the pots wherein the Cry¬
stall is calcin'd, and wherein the pasts are baked with lute well dryed, before they beset to calcine or bake.
2. Take pots that will bear the fire.
3. Grind all on Porphyrie-stone,and not
in metal,to a most implapable powder,first singly, and then together.
4. Keep a just proportion in the dose of the Ingredients.
5. Mix the materials well before you bake them, and if the past be not sufficient¬ly baked the first time, bake it again a se¬cond time in the potters furnace, and never
break the pot till you see 'tis baked, for if you do the pasts will be foul, and full of blisters.
6. Leave the vacuity of a fingers thick¬ness in the top of the pot, especially where 'tis said it swels much, or that you must put it in leasurely, lest the materials run out
into the fire, or stick to the cover, and so make a foul colour. 
How to make Oriental Emeralds.
CHAP. LXXVII.
T Ake of Crystall prepared two ounces, ordinary Red-lead four ounces, mix and incorporate them well together, good Verdigreas two peny weight, Crocus Mart is made with Vineger eight grains, Mix all well and set them in a potters furnace, in the hottest place thereof, as long as the fire lasts. To see whether the past be sufficiently baked and purified, clear and transparent, take onely off the cover made of lute, and if the past be pure and transparent to the bottom 'tis a sign 'tis baked enough. Other¬
wise relute, and bake it again, without breaking the pot for then the past will be full of points and blisters. Let the fire be continued 24 hours with dry wood.
I set up a furnace at Antwerp a purpose, wherein I kept 20 pots of divers colours, and with a fire in 24 hours melted and purified all of them, and to be the more secure, continue the fire six hours more, and and by this means the pall will be very well baked ,and little wood wafted. Thefe pads may be cut and wrought, in every thing, as ordinary Jewels, they wholly re¬ceive the fame polifhing and luftre, and are let in Gold with foiles, as the other commonly ate. This paft is harder than ordinary.
To make a deeper Emerald colour.
CHAP, LXXVI1I.
TAkc of Cryftall prepared an ounce,of * Ordinary Red-lead fix ounces and a half, mix them, and add,of Verdegreas a- bout three peny weight, and 13 grains, of Crocus Martis made with vinegcr 10 grains. Proceed according to the rules, and you fhall have a marvellous Emerald colour for fmall work?,and to be fet in Gold. This paft muft be baked more than ordinary, to waft that imperfe&ion which Lead ulu- ally gives; this paft is britlcr, but fairer than the former.
To ntakf a more beautiful paft for E- meraldf.
CHAP. LXXIX.
TAkc of Cryftall prepared two ounces, Ordinary Rcd-Iead (even ounces, mix and add to them of Perdegreas about ten grains to every ounce, and of Cr°cus Mortis made with Vinegar ten grains onely at a time, mix them and proceed according to rule, and you fhall have an Emerald paft for fmall works, very fair and beautiful, but not hard, by reafon of the plenty of lead. Wherefore bake it more than ordinary to take away the blackncls, and un&uofity Lead naturally yields.
sir.otber Another moss fair Emerald.
CHAP. LXXX.
TA ke of Crystall prepared two ounces, ordinary Minium six ounces,mix them, and add of good verdigeas well ground 80 grains, mix and bake them for a most fair Oriental Emerald.
An Oriental Topaz.
CHAP. LXXXI.
T Ake Crystall prepared two ounces, or¬dinary Minium seven ounces, mix them, and bake them, for a marvelous Oriental Topaz, to work any kind of work you please, K 2 An 
The fifth Book
An Oriental Chrysolite.
CHAP . LXXXII.
Ake of prepared Crystall two ounces, T ordinary Minium eight ounces, mix them, and add of Crocus Martis made with Vineger 12 grains, mix and bake them more than ordinary by reason of the great quantity of lead.
Sky colour.
CHAP . LXXXIII.
T Ake of Crystall prepared two ounces, ordinary Minium five ounces, mix them, and add 21 grains of Zaffer prepa¬red and ground, remix and bake them for a most beautiful Sky colour.
A Sky with a Violet colour.
CHAP. LXXXIV.
T Ake of Crystall prepared two ounces, ordinary Minium four ounces and a half, mix them, and add about four grains of Painters Blew smalts, mix and bake them, this past will be a most fair Violet, and pleasant Sky-colour.
An Oriental Saphyre.
CHAP. LXXXV.
T Ake of Crystall prepared two ounces,or- dinary Minium six ounces, mix them well, & add of Zaffer prepared five grains, mix with the Zaffer of Manganese prepared seven grains, remix and bake them for an Oriental Saphyre, which will have a most beautiful Violet colour.
K 3 A
A deep coloured Oriental Saphyre.
CHAP. LXXXVI.
JAkc of Cryftall prepared two ounces, l- ordinary Minium five ounces, of Zafier prepared about 42 grains, add to the Zafier of Manganefe prepared eight grains, mix and bake them well, and they will make a deeper Oriental Saphyre , with a Violce colour of notable fairnefs.
*
dnOncntal Garnat.
CHAP. LXXXVII.
TAkc of Cryftall prepared two ounces, ordinary Minium fix ounces, mix them and add about I6 grains of Manganefe prepared, wherewith mix three grains of Zaffer prepared, mix them all togetherpnd Vake them for a moft fair & fightly Garnat.
A
A Deeper Oriental Ganiat.
CHAP. LXXXVIII.
TAkc of Cryftall prepared two ounces, ordinary Minium five ounces and a half, of Manganefe prepared 15 grains, where¬with mix four grains of Zajfer prepared, mix them all, this fwells much, bake them for an Oriental Garnat, which hath in it a
very fair Violet colour.
'1
‘ - -
ylnotbcr fair Garnat.
CHAP. LXXXIX.
"J" Alee of Cryftall prepared two ounces, ordinary Minium five ounces, mix them, and add 5 2 grains of prepared, wherewith mix fix grains of Zajjer prepa¬red, mix them all well and bake them for an Oriental Garnat fairer than any of the former.


Obfervations for Pafis and their co¬lours.
CHAP. X C. /■
O
Bfervc,that the colours in the afore- faid pafts, may be made deeper, or lighter, according to the works they arc to be ufed for, and alfo the will and humour of the maker. Small ftoncs for rings, pern dants, and ear-rings require a fuller, but greater ftoncs, a lighter colour. No rules can be herein given, though .thofe given by me will give fome light to the curious Artift, to whofe judgement it muft be left, and who may find out and invent more and better colours. Bcfidcs I fet down here onely colours frem Verdigreas,Zafter* and Afanganefe. But a curious perfon and practical Chymift may extrad a wonder-ful Red from Gold, and another fair Red from Iron , from Brafs an exceeding fair Green,from Lead a Gold colour, from Sil¬ver a Sky-colour , and a much fairer from Gra.pats of Bohemia,which arc low-priz’d, ‘ . for
The fifth Book. *37 for being imall you may draw a tin&ure frotn them , as I have often done in Flan¬ders, and this doth notable effe&s. The fame may be done with Rubies, Saphyres and other Jewels. To write of thefe things would be a bufinefs too long for me, who fpeak fo clearly in this prelent work. But the colours abovefaid will make pleafant works.
The way to make the aboVefaid Pajls, and to imitate all forts of Jewels, marvelous and neDer ufed.
CHAP . XCI.
'J'His way which 1 have taken from Ifaac Hollandus, when I was in Flanders,to imitate Jewels, is not much ufed, and known perhaps to few perfons,and though it be fcmewhat laborious, Yet by how much 'tis more laborious 'tis fo much the fairer ^ and beautiful, than any made in any place whatfoevc-r to this day, or at leaft least not shewn to me by any person. Wherefore I will shew the manner to make them, so clearly, and with so many circumstances and observations, that any one versed in Chymistry will be easily ca¬pable thereof, and will do the work per¬fectly. Take Ceruss, otherwise call'd white lead, grind it very fine, and put it into a great glass body, and pour therein as much distil'd Vineger as will rise a palm above it. Observe that at first the vineger boils and swels, wherefore put it in by lit¬
tle and little, till all the fury and noise is gone. Then set the Vineger on a hot fur¬nace in sand, and evaporate away the eighth part of it, take it from the fire, and when the body is cold, decant leasurely the Vineger coloured enough, and impregna¬ted with salt, which set aside in a glass vessel, then pour more fresh distild Vine- ger on the Ceruss, and evaporate and de¬cant as before. Repeat this till you have extracted all the salt from the Ceruss, which is when the Vineger is coloured no more, nor hath any more taste of
sweetness, which usually succeeds the sixth time. Then Filtre these coloured Vine-gers gets mixt together, evaporate and dry • them in a glafs body, and the fait of Lead will be at the bottom of a white co¬lour. Which fet in land in a glafs bo¬dy from the neck downwards well luted, but the mouth of the glafs muft be open, and the furnace heated for twenty four hours continuance. Then take the fait out of the receiver, powder it, and if it be Yellowifh and not Red, fet it twen¬ty four hours in the fire, till it become as Red as Cinder. Make a good fire, but not to melt it, for then all your la¬bour and pains will be loft. Pour di- ftillcd Vinegcr on this Red-lead cal¬cin’d , repeating this work as before till you have ext railed all the fait from it, and feparated all the dregs and terreftrie¬ty in whole or in part. Keep thefe co¬loured Vinegers in earthen pans glafed fix days, that all the terreftriety and imper-1 fedion may fink to the bottom. Then | Filtre them, leaving the grofler part at the bottom as unprofitable, then cover the Vinegers in a glafs body, and there will remain at the bottom a moft white fait of lead, and fwcct as Sugar,which dry well 140 The fifth Book.
well and dissolve in common water, let the solution stand six days in glased pans, separate the terrestriety at the bottom, Filtre and evaporate as before, and there will remain at the bottom of the glass a salt as white as snow, and sweet as Sugar, Repeat this Solution, Filtration, and eva¬poration thrice. This salt is called Sac-charune Saturni. Which put into a fur¬nace into a body of glass in Sand, and at a temperate heat for many days, and it will appear calcin'd into a colour much redder than Cinaber, and as subtile and
impalpable as the finest serced wheaten flour. This is call'd the true Sulphur of Saturn purified from all terrestriety, foul- ness,and blackness which Saturn had at first in it self. Now when you would make pasts for Emeralds, Saphyres, Garnats, To¬paz, Chrysolite, Sky or any other co¬lour, take the same materials, colours, quantities as abovesaid in the former re¬
ceipts, except that instead of ordinary Red-lead, you shall take Sulphur Saturni, working; exactly in every thing as before And you shall have Jewels of marvel¬ous fairness in all colours, which very fa far furpafs the forementioned , made with ordinary Red-lead. For this true Sulphur Saturni outgoeth all others, more than I write thereof, as 1 have feen, and often made it at Antwerp. Parts made with this Sulphur, have not that un- ftuofity and Yellowncfs, as the other ordinary ones have , which in time fhew their foulnefs , and the moifture and fwcatinefs which coming from within men much foil them , which happens not to thofe made with the faid Sul¬phur. Wherefore think not that pains much , which will be well rccompenfcd with the work and effeft.
How • • 
Hoiv to make Very hard pafl of all colours.
CHAP. XCII.
TAkc of prepared Cryftall ten pound,fait of Polverine fix pound, made as io Chap. 3. well dryed and ground on a Porphvrie, mix and ferce them well toge¬ther, ulphur Saturni two pound, mix thefe three powders in earthen pans glafed and clean, and with a little common water mike with them a hard paft, and of the paft little cakes , each weighing three ounces, with a little hole in the midftof them, dry thefe in the fun,& then calcine them in the higheft part of the potters fur-nace,or mother like fires, then powder and grind thefe cakes on a porphyrie, and ferce them fine, then fet them in pots in glafs fur¬naces, to purifie three days, and caft them into water, and return them to the furnace for 15 days to purifie, that all the foul- nefs and bliftjrs mayvanifh , and the paft remain moft pure, like natural Jewels. And more* 
moreover this fort of pureft glafs will be tinged into all colours you defirc. For ex¬ample into an Emerald with Brafs thrice calcin’d, as is done in ordinary glafs,into a Sea-green , with Brafs calcin’d to rednefs, made as in Chap.24. and with Zajfer into a Topaz,into a Saphyre with Manganefe and Zajjer,intoYellow w'h Tartar & Manganefe, putting them in by parts, and into a Garnat alfo,with J/4»g<wr/eand Zajfer dividedly 5
ut in. And indeed this part imitates all ewels and colours, and hath a wonderful fhining and luftre, And in hardnefs too it imitates the jewels, Efpecially the E- mcrald, which will be made moft fair and alraoft as hard as the true.