The following extracts selected from numerous authors, contain a full elucidation of the hidden art on which so many thousand volumes have been written. "Certain it is their knowledge in some particulars went far beyond what the moderns, with all their advantages, can pretend to lay claim to. Their prime and grand arcanum was the Philosophers' stone-a secret which they concealed with much care, and which yet they were anxious should be discovered by a few, from their writings." A few of the alchemists mentioned are: Eyræneus Philaletha, Raymund Lully, Ripley, Bacon, Geber, Flamel, Kelly, Basil Valentine, Theophrastus. Contents: Of Sulphur-Sol; Of our Mercury-Regulus of Antimony and Mars; Of the Secret Fire-Sublimate of Mercury; Of Rebis; Of the Three Principles; Of the Furnace and Glass; Of the Work.