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.

The salification of Allom.

TO obtain the fixed part of Allom, ℞ lib. j. or ij. of the Caput mortuum of the distillation of the spirit of Allom, and put it in a Cucurbite; then pour upon it distilled Rain-water six fingers high, digest it in ashes in a moderate heat, which must be encreased by degrees, till the Liquor begins almost to boyl; stir it from time to time with a wooden Slice, then filtrate, and e∣vaporate the filtration in the vapour of a boyling Balneo, in a gray earthen or white earthen Dish till the skin begins to cover it, then let it stand in a cool place and there shute into Chry∣stals, or evaporate it to a dry bottom, stirring continually till it quite dry. This Salt is much more active then burnt Allom, be∣cause it is separated from its earth, and for this reason may be a plyed in much lesse quantity to the same uses. It may be also internally given to those that have a stomach stuft with slime or other foulnesse which deads and duls the appetite: for it will cut them, attenuate and expel, either by stool or vomiting. The Dosis must be from grain vj. to xij. or xv. in Broth or deco∣ction of wild Endive, or Spanish Scorzonera Roots.