The Lime must be spread upon the ground, where no Rain can come to it, till it slake it self by the Air, and fall into a Powder; of this Powder you are to take four hundred weight to one hundred weight of any common foul Salt, which is too impure for the use of the Kitchen, where such may be had, otherwise clean Salt, (for that will be cheaper than Dung) the Salt and Lime are to be well mixed, and then moistened with such a quantity of Water, (or rather Urine where it may be had) as will bring the Lime and Salt mixed, to the Consistency of a stiff Mortar. Of this Mass Balls are to be made about the bigness of ones Fist, and laid under a Shead, or Hovel to dry; being dried, they are to be burnt in a Kiln as Lime is, so that the Balls may be red hot for an hour at least; or where no Lime-Kiln is near, they may be burnt by building a Pile in the Field, first with a Lay of Wood, then a Lay of Balls, then Wood again, and so till all the Balls are placed fit for burning. When the Balls are burnt, they are to be again placed upon a Floor under a Shead, or Hovel, where they may be exposed to the Air, but kept free from the Rain, and if you break them with a Clod-beater presently, the Air will the sooner act upon them, and cause them again to fall into a Powder; which Powder may then be carried out and spread, or rather sowed out of a Seedlet, thicker or thinner as the Land shall require. Provided this be done in the beginning of Summer about the time of Fallow, for that being many Months before the Seed is to be sowed, the fieryness of this rich Compost will be Contemperated by the Air and the Earth, and changed into a Nitrous fatness, which joining it self with the Earth, is again Magnetically attracted by the Seed when it is sown, whose growth it thereby swiftly promoted, and its Multiplication much augmented. But if any should cast this Matter upon his Land soon after it is burnt, and presently after that should sow his Seed, instead of having a greater Crop than he used to have, he would have a less, or perhaps none, that Year, but the next Year, and soon for many Years, the same Land would bring forth plentifully. Therefore it is necessary, that this Matter should lie six or seven Months spread upon a Floor, and now and then turn’d with a Shovel, as you turn Malt, that it may be Contempered, and Animated by the Air; or be cast upon the Land so long before the Seed be sown. The reason is the very same as with Dung, for none takes fresh Dung and spreads it upon his Land when he is about to sow his Seed, for if he should, his Seed would be burnt up; but the Husbandman lets his Dung lie some time to rot, as he calls it, after which he lays it on his Land, and lets it lie spread some time before he Plows it in, and all this is but to Contemper the heat of the Animal Salt contain’d in the Dung, and turn it into a Nitrous Nature. Thus much I thought good to say about this Matter in the plainest words, least any, not throughly understanding the Author’s Intention, should erre in the first Experiment, and so unjustly blame the Author, and forbear themseldes and deterr others from prosecuting that easie Practice, which I am confident, if rightly managed, will bring much profit to many persons in this Nation. This must also of necessity be a profitable Work to those who will undertake it upon the account of making of Salt-petre; especially to such as understand the Nature and Generation of that Excellent salt, which is of such incomparable use in the Preparation of Medicines, separating of Metals, and in many Mechanick Arts.

Now for as much as in this Work Sal Mirabilis, Spirit of Nitre, and Spirit of Salt, are recommended to very many uses, and every one that hath a mind to make Experiments with them, may not have the knowledge, or the conveniency of preparing them, I hereby signifie, that I intend (God willing) to prepare and keep by me the Author’s Sal Mirabilis of both sorts, that peculiar Spirit of Salt, which he commends against the Scurvy and other Diseases, and also to keep Beer from sowring in the Summer, in the Consolation of Navigators. His Panacea of Antimony, and Golden Panacea, spoken of in the [Second Part of the Pharmacopœia Spagyr.] the [Explication of Miraculum Mundi], and divers other places. His Aurum Diaphoreticum, also the Tincture of Gold, or Aurum Potabile, are described to be made of the Irreducible Blood of the Lyon, in the [Sixth part of the Spagyrical Pharmacopœia], Chap. 22. These I purpose constantly to keep by me for the accommodating of Physicians, and others, who shall have occasion to buy them. Those are Excellent Medicines, and such as a Physician may have some confidence in; and indeed, this Book contains a great variety of such Medicines as will get a Physician Honour, which (I hope) will be tryed by all those who delight to do good, and be brought into use for the general Help and Comfort of the sick. For I freely confess, that if I have any thing in Medicine, beyond what is commonly known, I have had the Foundations of it from this Author; and if God shall please to grant me life to a fit time, I doubt not but I shall from those Foundations be able to raise such a Superstructure as shall testifie the truth of his Writings, and powerfully evince the Worth and Excellency of Chymical Medicines, and that demonstratively in matter of Fact, viz. by the Curing of both Acute and Chronick Diseases.

And now by way of Conclusion, I have only one thing more to add; and that is a Request to all the Ingenious Lovers of Chymistry, that they would not occasion this Work which I have undergone with so much labour, and loss of time from my private Concerns, meerly for the good of others, to redound to my own hurt; my meaning is, That I might not be put to the charge and trouble of Letters about Curious Enquiries, wherein I am to have not the least profit: This I mention, because I have had divers such Letters come to my hands since I have been about it, and that sometimes two or three very long ones with many Queries, in one Week. Now should this continue, and I endeavour to satisfie all the Doubts, and gratifie all the Curiosities of all such non-considering persons, truly I should have no time besides what this would take up, to provide for my self and Family. But notwithstanding what I have said, if any Ingenious Person shall stand in need of my Assistance, in preparing of any thing for him, or otherwise, wherein I may have a reasonable recompence for my Time and Trouble, I will be ready to give him the best assistance I can. For I am now but just ready to receive a Writ of Ease from three Years daily labour and care about this Work, and I would be willing to enjoy it some time, that I might again with diligence apply my self to my Laboratory, the effects of which, if God shall see good, may at one time, or other, shew themselves to the World. In the mean time, I wish all Honest and Ingenious Lovers of the Spagyrick Art, good success in their Studies and Labours, that thence the Penuries and Miseries of Mankind, especially of the sick, may be effectually remedied; that they may Cooperate as Instruments with the great ends and providences of the Almighty, to bring about that time, in which God shall be Glorified all the World over, and Men live in a more serene and tranquil condition than yet they have done, which shall always be the Desire and Prayers of him that is a Lover of Pyrotechny, and Honourer of all true Artists.

Chr. Packe.

From my House next Door to the Sign
of the Gun in Little Moor-Fields, the
1688.

A
CATALOGUE
OF THE
Subscribers NAMES.

THE
FIRST PART
OF
Philosophical Furnaces.

Containing a new Art of making Spirits, Oyls, Flowers, and other Medicaments, by the help of the first of those Furnaces, after a very easie and peculiar manner out of Vegetables, Animals and Minerals: With their Chymical and Medicinal use.