This volume, which, according to the subtitle, is a complete manual of psycho-physiological technique for the treatment and correction of defects of speech, does not differ in its main essentials from the usual treatises on the subject. It is primarily concerned with phonetic training based on the physiological alphabet and consequently is directed only to the peripheral aspect of speech disorders. Such a method is undoubtedly of value in the correction of faulty articulation and in organic cases of speech mutilation. However, it can be of practically no help in stammering, to which the authors