WARNING.

useful to know in what manner they are drawn from the entrails of the earth, and how they are purified and led to their perfection. The origin, use, and extraction of salts, of which I have likewise marked some treatises, is not useless in the Hermetic Science. For the rest, I have very rarely slipped, and have not lost sight of the principal goal of my work.

I thought that in order to spare the trouble of scouring the memoirs of the Royal Academy of Sciences Académie Royale des Sciences, and the Philosophical Transactions of the Royal Society of London, I would please the curious by giving an inventory of the chemistry operations found there.

The authors are distinguished by a number placed between lines, and the treatises by the same author are distinguished only by a fleuron a small ornamental floral design.