The various forms of feeling——its specialization: (_a_) touch, the feeling of mere limits, the indifferent external independence of the organism and its surroundings; (_b_) taste, feeling of the external object when it is undergoing dissolution by assimilation; (_c_) smell, the feeling of chemical dissolution in general; (_d_) hearing, the feeling of the resistance of bodies against attacks: sound being vibration caused by elastic reaction against attacks on cohesion; (_e_) seeing, the feeling of objects in their independence, without dissolution or attack; plant life, nutrition, a process in which the individuality is not preserved either in time or in space; animal life, as feeling, preserves its individuality as regards space, but not as regards time. Having noted these important characteristics of the lower orders of life, and found that _reaction_ from the part against the whole——from the internal against the external——belongs to plant life and animal life, we may now briefly mention the ways in which feeling is particularized. In the lower animals it is only the feeling of touch; in higher organisms it becomes also localized as seeing, hearing, taste, and smell. These forms of sense-perception constitute a scale (as it were) of feeling. With touch, there is reproduction of externality, but the ideality of the reproduction is not so complete as in the other forms. With taste, the feeling cognizes the external object as undergoing dissolution, and assimilation within its own organism. We taste only what we are beginning to destroy by the first process of assimilation——that of eating. In smell, we perceive chemical dissolution of bodies. In seeing and hearing, we have the forms of _ideal_ sensibility. Hearing perceives the attack made on the individuality of an external thing, and its reaction in vibrations, which reveal to us its internal nature——its cohesion, etc. In seeing, we have the highest form of sense-perception as the perception of things in their external independence——not as being destroyed chemically, like the objects of taste and smell; not as being attacked and resisting, like the objects which are known through the ear; not as mere limits to our organism, as in the sense of touch. Sense-perception, as the developed realization of the activity of feeling, belongs to the animal creation, including man as an animal.