ical conditions for taboo with which we have become acquainted in the case of compulsion neurosis. How did we gain our knowledge of these psychological factors in the case of neurosis? Through the analytical study of the symptoms, especially the compulsive actions, the defense reactions and the obsessive commands. These mechanisms gave every indication of having been derived from ambivalent impulses or tendencies, they either represented simultaneously the wish and counter-wish or they served preponderantly one of the two contrary tendencies. If we should now succeed in showing that ambivalence, i.e., the sway of contrary tendencies, exists also in the case of taboo regulations or if we should find among the taboo mechanisms some which like neurotic obsessions give simultaneous expression to both currents, we would have established what is practically the most important point in the psychological correspondence between taboo and compulsion neurosis.
We have already mentioned that the two fundamental taboo prohibitions are inaccessible to our analysis because they belong to totemism; another part of the taboo rules is of secondary origin and cannot be used for our purpose. For among these races taboo has become the general form of law giving and has helped to promote social ten-
