Tertium Organum

This is P.D. Ouspensky’s Tertium Organum, which he believed was the third major philosophical synthesis, the previous being those of Aristotle and Bacon. Originally issued in Russian in 1912, this is the second, revised edition. It was translated into English and published in 1922. This is the only major work by Ouspensky which is in the public domain in the US by current copyright laws.
Ouspensky (1878-1947) was a mystic who traveled widely in Europe and the East looking for esoteric kno
