Chemical Library

those who wish to assemble Bibliothecas libraries, as well as those who will seek the works of certain Authorum authors, and since, moreover, books of arcanorum secrets and minerals are indicated therein: therefore, deign to scan this little book with your eyes, (most learned man), for better things are being prepared for you as a most worthy man, which will be more pleasing to you and more useful to the republic of the learned. In the meantime, accept this as a pledge of a sincere mind, and one most devoted to you, Farewell.

Paris, Kalends of
January
1654.

PREFACE,

On the utility of this book.

I have often wondered, not without reason, that men, who have left almost no subject untouched in their writings, have not yet composed a Chemical Library. Moved by the persuasion of friends, I have applied myself to this work, and I have found a greater number of authors than I had promised myself