From what has been said, it is seen that we can know only those things concerning the outside world which are capable of being reported to us by means of sense impressions, simple or complex--all of our thought regarding the world is made up from "the raw materials of thought" which psychologists have termed sensations. Consequently, if an individual is deprived of one or more of his ordinary senses, his knowledge of the outside world is decreased to just that extent. And, likewise, if the individual were to be given one or more additional senses, his knowledge of the world would be increased in the same ratio. The same result, at least in a certain degree, would be attained if the existing senses of the individual were to be increased in power so as to register higher rates of vibration than they now consciously register and record. The Evolution of the Senses. This subject of increased sense-powers has always been a fascinating one for the psychologists, and much speculation has been indulged in concerning the increased consciousness of mankind were additional senses opened to it. We ask you to carefully consider the following quotations from psychologists possessing the "scientific imagination." A psychologist says: "All the senses have been evolved from the elementary sense of Touch. All of our senses are but modified, specialized, and more complex forms of the sense of Touch. The elementary life-forms possessed merely the sense of Touch; and that but faintly developed--but a faint sensitiveness to outside impressions. Then developed the sense of Taste, from which later evolved the sense of Smell, the latter even now being closely associated with the former. Then evolved the sense of Hearing, or the consciousness of the contact of air vibrations called 'sound.' Then evolved the sense of sight, or the consciousness of contact with the light waves of the other. And it is not impossible, or even improbable, that the human race will eventually develop other and more complex senses--in fact, many even now claim that the development of extra senses is now under way in the race, and that the same are now manifesting the presence and their powers in exceptional cases." Unfoldment of New Senses