First published in 2000. Routledge is an imprint of Taylor & Francis, an informa company.

This is Volume VII of eight in a series on the Philosophy of Mind and Language. Originally published in 1931, this book presents Speculative Results according to the Inductive Method of Physical Science. Interest in Hartmann's conception of the Unconscious until the beginning of the present century was primarily metaphysical; his treatise was merely the first, and most significant, of the thirty volumes which set forth his "system."