Book Details + Condition: Alfred A. Knopf (New York). Third Edition, 1945. Hardcover. Includes fold-out "Table of the Four Forms of the Manifestation of Consciousness". TERTIUM ORGANUM: THE THIRD CANON OF THOUGHT - A KEY TO THE ENIGMAS OF THE WORLD. A justification of mysticism through science. P.D. Ouspensky presents the world we live in as multi-dimensional, and time as a motion through this world. The physics and mathematics are tightly integrated with mystic teachings. Tight binding; light shelf wear to boards; rubbing to spine ends; normal age toning to pages; interior is clean and free of markings.