The former are said to be dimensions like quality, intensity, extensity, and duration, dimensions of hue, brightness, and saturation, of pitch, loudness, and timbre, of pressure, warm, cold, and pain. The latter are dimensions of the environment, the variables of events and those of surfaces, places, objects, of other animals, and even of symbols. The field is composed of adjacent areas, or figures; the world is composed of surfaces, edges, and depths, or solid objects and interspaces. The corresponding sensations, however, the film colors obtained by seeing a surface through an aperture, vary widely with illumination. The flux and array of pressure sensations and articular sensations from a dozen or so joints ought to be of bewildering complexity. The good features of behaviorism are being lost in the retreat of psychologists into the old concern with sensations and images. The S-R formula has failed but the emphasis on action and adjustment is valid.