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._