Histoire De La Philosophie Hermétique : Accompagnée d'un Catalogue raisonné des Ecrivains de cette Science ; Avec le Véritable Philalethe, revû sur les Originaux. 3

ctoris, Miscellanea verè utilia Truly Useful Miscellany, or Miscellaneous Experiments, and Observations on Various subjects, in 3 parts, in-8°. London. In English. The author of this little work is the son of the famous Mr. Godfrey, a great chemist in London, and a disciple of Mr. Boyle. The father shone through a universal practice of rational chemistry, but did not dedicate himself to the Hermetic Science.

Ger. Goris, Mercurius Triumphator, continens Argenti-Vivi Historiam Triumphant Mercury, containing the History of Quick-silver, in-8°. Leiden. 1717. This book should be curious, provided it examines the differences found in the various kinds of Quick-silver. For it is known from experience that this metallic water drawn from Spain and Hungary is much better than that from Poland or China.

C. Hellwigs, description des plus rares secrets de Médecine & de Chimie Description of the rarest secrets of Medicine and Chemistry, in-12. Leipzig. 1704. In German. I have already noted some treatise by this author in the Catalogue.

Joan. Otton. Helwig, Arcana majora, sive curiosæ descriptiones Physicæ, Medicæ, Alchimicæ, Chirurgicæ & œconomicæ Greater Secrets, or curious descriptions of Physics, Medicine, Alchemy, Surgery and Economics, in-8°. Leipzig. 1710. In German.

Joann. Friderici Henkel, Appropriatio, seu mineræ Argenti Rubræ Combinatio cum Acido Salis communis Appropriation, or the Combination of Red Silver Ore with the Acid of common Salt, in-8°. Dresden and Leipzig. 1727. *This small work, which contains no more than 126 pages, is very rare even in Germany: I am astonished that the booksel-