NERVOUS AND MENTAL DISEASE MONOGRAPH SERIES NO. 7

THREE CONTRIBUTIONS TO THE THEORY OF SEX

_SECOND EDITION_
_SECOND REPRINTING_

BY

PROF. SIGMUND FREUD, LL.D.
VIENNA

AUTHORIZED TRANSLATION BY

A.A. BRILL, PH.B., M.D.
CLINICAL ASSISTANT, DEPARTMENT OF PSYCHIATRY AND NEUROLOGY, COLUMBIA
UNIVERSITY; ASSISTANT IN MENTAL DISEASES, BELLEVUE HOSPITAL; ASSISTANT
VISITING PHYSICIAN, HOSPITAL FOR NERVOUS DISEASES

WITH INTRODUCTION BY

JAMES J. PUTNAM, M.D.

NERVOUS AND MENTAL DISEASE PUBLISHING CO.
NEW YORK AND WASHINGTON
1920