Contents: Chapter I. On the general relationship of man to the world around him, and his adaptation to the planet he tenants Chapter II. Man's knowledge of the qualities of matter obtained through the medium of the senses Chapter III. The senses, as the inlets to knowledge?sight and hearing Chapter IV. Observations on the agency of the senses, relative to the union between mind and matter; and on the occasional imperfection of the bodily organs of the senses, with the results depending thereupon.