In 1904, Pierre Janet delivered in Boston a series of lectures on psychotherapy, which formed the basis of a large three volume work, Les médications psychologiques, published in 1920. The present brochure is an abstract of the more essential parts of that work, with especial emphasis on "the basic principles" and principal methods of psychotherapy.
In his preface, the author states that after a summary of the evolution of the methods of mental treatment will follow "a study of the psychologic phenomena and the laws on which the most interesting methods are based," and that then he "will indicate the conditions under which such methods of treatment can be applied with chances for success." This is something of an undertaking and that the author fulfils his contract may seriously be questioned. That he details a great number of the symptoms and behavior peculiarities of neurotic persons and does it in