A compendious body of chymistry, which will serve as a guide and introduction both for understanding the authors which have treated of the theory of this science in general: and for making the way plain and easie to perform, according to art and method, all operations, which teach the practise of this art, upon animals, vegetables, and minerals, without losing any of the essential vertues contained in them. By N. le Fèbure apothecary in ordinary, and chymical distiller to the King of France, and at present to his Majesty of Great-Britain.

To make a very excellent fix Precipitate.

℞ ℥ iij. of purified Mercury, ℥ ij. of yellow Brimstone, ℥ j. ss. of Armoniack salt very pure: mix and pound all in a Marble mortar so long that none of the Mercury will more appear, though being rub'd on the palm of the hand; this mixture put in a Viol or Matrass in sand and give it a sublimatory fire; the sublimation being ended break the Vessel, and separate cleanly the sublimed matter, and pound it again, and mix with the mat∣ter left in the bottom of the Vessel; then begin to sublimate a∣gain, and thus do four times: but at the fourth time, give it a good fire towards the end, until the bottom of the Matrass or Viol growes red hot; wherefore the Artist must leave less sand in the bottom of the pan then at other times; the matter being cooled, keep that you shall finde in the bottom of the Vessel, and preserve it as a very good Medicament, having the vertue to expel from the body sound or sick, all what may be noxious to it, by sensible or insensible transpiration; it is given fron four gr. to twenty in Treacle, or extract of Juniper berries.