The mysteries of opium reveal'd, [electronic resource] : by Dr. John Jones, Chancellor of Landaff, a Member of the College of Physicians in London: And formerly Fellow of Jesus-College in Oxford. Who, I. Gives an Account of the Name, Make, Choice, Effects, &c. of Opium. II. Proves all former Opinions of its Operation to be meer Chimera's. III. Demonstrates what its true Cause is; by which he easily, and Mechanically explains all (even its most mysterious) Effects. IV. Shews its noxious Principle, and how to separate it; thereby rendering it a safe, and noble Panacea; whereof, V. He shews the palliative, and curative Use. A Deo Lux.