Containing, I. The Discovery of a New World ... II. That 'tis Probable Our Earth is One of the Planets. III. Mercury: Or, The Secret and Swift Messenger ... IV. Mathematical Magick: Or the Wonders that May be Perform'd by Mechanical Geometry. V. An Abstract of His Essay Towards a Real Character, and a Philosophical Language. To which is Prefix'd the Author's Life, and an Account of His Works