Acknowledgements -- Table of Figures -- Introduction -- Wundt and the Concept of the Gesture -- The Psychophysics of Expression of Wilhelm Wundt -- The Language of Gestures -- I. Forms of Development of Gestural Communication -- 1. Concept and General Characteristics of Gestural Communication -- 2. Gestural Communication among Deaf-mutes -- 3. Gestural Communication and Primitive Peoples -- 4. Inherited Gestures among Civilized Peoples -- 5. Gestural Signs among the Cistercian Monks -- II. Basic Gestural Forms -- 1. Psychological Classification of Gestures -- 2. Demonstrative Gestures -- 3. Imitative Gestures -- 4. Connotative Gestures -- 5. Symbolic Gestures -- III. Ambiguity and Change of Meaning of Gestures -- 1. The Vagueness of the Conceptual Categories -- 2. The Transition of Concepts and the Change of Meaning of Gesture -- IV. The Syntax of Gestural Communication -- 1. The Sequence of Gestures among Deaf-mutes -- 2. The Sequence of Gestures among Indians -- 3. Psychological Causes of Gestural Syntax -- V. The Psychological Development of Gestural Communication -- 1. The Origin of Gestures from Expressive Motions -- 2. Gestures and the Origin of Graphic Art -- 3. Gestural Communication and Pictography -- 4. The Psychological Character of Gestural Communication.