TO THE AUTHORS.

than Agricola Georg Bauer, a pioneer in mineralogy, Ercker Lazarus Ercker, author of works on metallurgy, and Borrichius Olaus Borrichius, chemist and scholar; however, it must be admitted that he benefited from their insights, which he combined with sound principles and extensive practice.

Caspar Crameri Collegium Chymicum Caspar Cramer's Chemistry Lecture/Course, in-4°. I only know the title.

Johan. DEUCERI Metallicorum Corpus Juris Body of Laws concerning Metals, in-fol. Leipzig. 1624. It is useful to have gathered in one body the laws that concern metals; however, each nation has its own, so it would be necessary to collect them all.

D'EMERY, Nouveau Recueil des plus beaux secrets de Medecine New Collection of the Finest Secrets of Medicine, in-12. Paris. 1713. 2 volumes.

A decorative typographical divider features floral and scroll motifs.

--- Idem, in-12. Paris. 1740. 4 vol. These are recipes for all sorts of useful and curious materials. There are many concerning metallurgy, which is why they have a place in this Catalogue. The work was printed in Paris around the year 1664 in two small volumes, then in Holland in two somewhat larger volumes. Finally, the work returned to Paris, and the latest edition is much more comprehensive than the others. Some are passable, and others are very poor.

Enchyridion Physicæ restitutæ, cum Arcano Philosophiæ Hermeticæ Handbook of Restored Physics, with the Secret of Hermetic Philosophy, in-8°. Paris. 1608. I place this edition of this book here, attributed to President d'Espagnet. It seems to me to be the first that appeared. From this, one can see that Morhof was mistaken in