This is P.D. Ouspenky'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.
Tags: tertium organum , tertium , organum , tertium_organum , tertium organum descargar , oranum , tertium organum portugues , tertium organum em portugues , tertium organum in english