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 prepare the Martial or chalybeated Tartar.

℞ lb j. of purified Tartar in the manner as we just now have taught, with which you shall mix ℥ ij. of cleansed filings of Needles: boyl in an earthen glazed Pot lb viij. of Rain-water very clear, or rather distilled, and pour in it softly the mixture of Tartar and filings, and let them boyl together as long as you would to make a soft Egg, then run it through a woolen strainer, and agitate the Liquor until it be cooled; and you shall have a Pouder of Martial or Chalybeated Tartar of a greenish colour, and shining when dry, and without compare more aperitive then the purified Tartar which hath been described before: For it has in it the Vitriol of Mars, which the sharp∣nesse of the Tartar hath drawn as the greenish colour doth evi∣dence: It is administred in the same Liquors, but the Dosis must be lesse: for the Dosis of this must not exceed ℈ φ. to 32. in all the Diseases and obstructions wherein we have said the o∣ther was useful.