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.

How the faetid oyle of Sulphur or Brimstone is to be prepared.

℞ lib. j. of Brimstone made into fine powder, mix it with lib. j. s. of oyle of Linseed in an earthen glazed pan; put this pan on a slow fire at first, and stir continually the matter, encreas∣ing the fire by degrees, until all be well boyled and united into a lump, which will have some likenesse unto coagulated Oxe blood; let the matter cool to mix it afterwards with lib. ij. of calcined Vitriol; and put it in a capacious and well luted Retort, to make the distillation thereof in a close Reverberatory, accord∣ing to the several degrees of fire; aft••r distillation separate the oyle from the waterish Liquor; then rectifie the oyle in sand with twice its weight of salt of Tartar, and this will subtiliate it and correct much the stench and ill odour thereof. It is an ad∣mirable secret in time of Plague to bring the boyles or sores to maturation, and cure the Ulcers after the skars are fallen from the sore: it advances also their maturation and falling, and hin∣ders the venom from spreading too far.