Philosophy of the Unconscious: Speculative Results According to the Induction Method of the Physical Sciences (German: Philosophie des Unbewussten) is an 1869 book by Eduard von Hartmann. The culmination of the speculations and findings of German romantic philosophy in the first two-thirds of the 19th century, Philosophy of the Unconscious became famous. By 1882, it had appeared in nine editions. A three volume English translation appeared in 1884. The English translation is more than 1100 pages long. The work influenced Sigmund Freud's and Carl Jung's theories of the unconscious.