hath the name improperly of Fire against Nature, because in a manner it is according to Nature, for although it destroys the specific form, and corrupteth the matter, yet it disposeth it for reproduction.
95. It is more credible nevertheless that the corrupting Fire, called Fire against Nature, is not different from the Innate, but the first degree of it, for the order of nature requireth, that Corruption should precede Generation: the fire therefore that is innate, agreeable to the Law of Nature, performeth both, by exciting both successively in the matter: the first of corruption more gentle stirred up by feeble heat to mollify and prepare the body: the other of generation more forcible, moved by a more vehement heat, to animate and fully inform the Elementary body disposed of by the former. A double Motion doth therefore proceed from a double degree of heat of the same fire; neither is it to be accounted a double Fire, for far better may the name of "Fire contrary to Nature" be given to violent and destructive fire.
96. Unnatural Fire is converted into Natural or Innate Fire by successive degrees of Digestion, and increaseth and multiplieth it. Now the whole secret consisteth in the multiplication of Natural Fire, which of itself is not able to Work above its proper strength, nor communicate a perfect Tincture to imperfect Bodies; for although it be sufficient to itself, yet hath it not any further power; but being multiplied by the unnatural, which most aboundeth with the virtue of multiplying doth act far more powerfully, and reacheth itself beyond the bounds of Nature-colouring strange and imperfect bodies, and perfecting them, because of its plentiful Tincture, and the abstruse Treasure of multiplied Fire.
97. Philosophers call their Water, Fire, because it is most hot, and indued with a Fiery Spirit; again Water is called Fire by them, because it burneth the bodies of perfect Metals more than common fire doth for it perfectly dissolveth them, whereas they resist our Fire, and will not suffer themselves to be dissolved by it; for this cause it is also called Burning Water. Now that Fire of Tincture is hid in the belly of the Water and manifests itself by a double effect, viz., of the body's Solution and Multiplication.
98. Nature useth a double Fire in the Work of generation, Intrinsic and Extrinsic; the former being placed in the seeds and mixtures of things, is hid in their Centre; and as a principle of Motion and Life doth move and quicken the body. But the latter, Extrinsic, whether it be poured down from Heaven or Earth, raiseth the former, as drowned with sleep, and compels it to action; for the vital sparks implanted in the seeds stand in need of an external motor, that they may be moved and act.
99. It is even so in the Philosophers' work; for the matter of the Stone possesseth his Interior Fire, which is partly Innate, partly also is added by the Philosophers Art, for those are united and come inward together, because they are homogeneous: the internal standeth in need of the external, which the Philosopher administereth according to the Precepts of Art and Nature; this compelleth the former to move. These Fires are as two Wheels, whereof the hidden one being moved by the visible one, it is moved sooner or later; and thus Art helpeth Nature.
100. The Internal Fire is the middle agent between the Motor and the Matter; whence it is, that as it is moved by that, it moveth this; and if so be it shall be driven intensely or remissly, it will work after the same manner in the matter. The Information of the whole Work dependeth of the measure of External Fire.
101. He that is ignorant of the degrees and points of external Fire, let him not start upon the Philosophical Work; for he will never obtain light out of darkness, unless the heats pass through their middle stages, like the Elements, whose Extremes are not converted, but only their Means.
102. Because the whole work consisteth in Separation and perfect Preparation of the Four Elements, therefore so many grades of Fire are necessary there unto; for every Element is extracted by the degree of Fire proper to it.
103. The four grades of Heat are called the heat of the Water Bath, the heat of Ashes, of Coals, and of Flame, which is also called "Optetic:" every grade hath its degrees, two at least, sometimes three; for heat is to be moved slowly and by degrees, whether it be increased or decreased; so that Matter, after Nature's example, may go on by degrees and willingly unto formation and completion; for nothing is so strange to Nature as that which is violent. Let the Philosopher propound for his consideration the gentle access and recess of the Sun, whose Light and Lamp bestoweth its heat to the things of the world, according to the times and Laws of the Universe, and so bcstoweth a certain temperament upon them.
104. The first degree of the Bath of Heat is called the heat of a Fever; the second, of Dung. The first degree of the second grade is the simple heat of Ashes, the second is the heat of Sand. Now the degrees of Fire, Coals and Flame want a proper Name, but they are distinguished by the operation of the intellect, according to their intensity.
105. Three Grades only of Fire are sometimes found amongst Philosophers, viz., the Water Bath, of Ashes and of Flame: which latter comprehendeth the Fire of Coals and of Flame: the Heat of Dung is sometimes distinguished from the Heat of the Bath in degree. Thus for the most part Authors do involve the light in darkness, by the various expressions of the Philosophers' Fire; for the knowledge thereof is accounted amongst their chief secrets.
106. In the White Work, because three Elements only are extracted, Three degrees of Fire do suffice; the last, to wit the "Optetic," is reserved for the Fourth Element, which finisheth the Red Work. By the first degree the eclipse of Sol and Luna is made; by the second the light of Luna begins to be restored; by the third Luna attaineth unto the fulness of her splendour; and by the fourth Sol is exalted into the highest apex of his glory. Now in every part the Fire is administered according to the rules of Geometry; so that the Agent may answer to the disposition of the Patient, and their strength be equally poised betwixt themselves.
107. Philosophers have very much insisted upon secrecy in regard to their Fire; they scarce have been bold to describe it but shew it rather by a description of its qualities and properties, than by its name: as that it is called Airy Fire, Vaporous, Humid and Dry, Clear or Star-like; because it may easily by degrees be increased or remitted as the Artificer pleaseth. He that desireth more of the knowledge of Fire may be satisfied by the Works of Lullius, who hath opened the Secrets of Practice to worthy minds candidly.
108. Of the conflict of the Eagle and the Lion also they write diversely, because the Lion is the strongest animal, and therefore it is necessary that more Eagles act together (three at least, or more, even to ten) to conquer him: the fewer they are, the greater the contention, and the slower the Victory; but the more Eagles, the shorter the Battle, and the plundering of the Lion will more readily follow. The happier number of seven Eagles may be taken out of Lullius, or of nine out of Senior.
109. The Vessel wherein Philosophers decoct their work is twofold; the one of Nature, the other of Art; the Vessel of Nature which is also called the Vessel of Philosophy is the Earth of the Stone, or the Female or Matrix, whereinto the sperm of the Male is received putrefies, and is prepared for generation; the Vessel of Nature is of three sorts, for the secret is decocted in a threefold Vessel.
110. The First Vessel is made of a transparent Stone, or of a stony Glass, the form thereof some Philosophers have hid by a certain Enigmatic description; sometimes affirming that it is compounded of two pieces, to wit, an Alembic and a Bolt-head; sometimes of three at other times of the two former with the addition of a Cover.
111. Many have feigned the multiply of such like Vessels to be necessary to the Philosophical Work, calling them by divers names with a desire of hiding the secret by a diversity of operations; for they called it Dissolvent of solutions; Putrefactory for putrefaction; Distillatory for distillation; Sublimatory for sublimation; Calcinatory for calcination &c.
112. But all deceit being removed we may speak sincerely, one only Vessel of Art sufficeth to terminate the Work of either Sulphur; and another for the Work of the Elixir; for the diversity of digestions requireth not the change of Vessels; yea we must have a care lest the Vessel be changed or opened before the First work be ended.
113. You shall choose a form of glass Vessel round in the bottom (or cucurbit), or at least oval, the neck a hand's breadth long or more, large enough with a straight mouth made like a Pitcher or Jug, continuous and unbroken and equally thick in every part, that it may resist a long, and sometimes an acute Fire The cucurbit is called a Blind-head because