2076. There are indeed three animal senses; but as the osseous and muscular system form in their conjoined operation but one system or the motor system--there can be therefore only 2 animal senses. The osseo-muscular or motor sense is the ear. If the nervous system becomes wholly self-substantial, the nervous sense thus originates, or the eye, in which the brain itself has been planted outwardly, and acts independently of all other systems. 2077. The vessels form the general system, and therefore the tegumentary sense surrounds the whole body. Its brain is the spinal cord. 2078. The four remaining senses are perfections of individual systems at their perfect extremity, and thus in the proximity of the mouth and the brain. They together form the head. The jaws and the tongue obtain their nerves from the medulla oblongata, and this is therefore the brain of the gustatory sense. The brain for the nose is the gray cerebral substance, because the olfactory nerves are its elongations. The ears obtain their nerves from the cerebellum, which is consequently the auditory brain. The eyes are developments of the great brain or cerebrum--optic brain. Such is the rationale and signification of the divisions of the brain. 2. OSSEOUS SYSTEM. 2079. The nervous mass consists of indifferent, deoxydized blood-globules. If these be peroxydized, then the highest oxyd of the planet is deposited in them, namely, the earth, and that indeed which was the last remnant in the order of their production, or the calcareous earth. 2080. Vesicles or cells replete with calcareous earth are globes. The osseous texture consists therefore of globes; is only a dense cellular tissue, and thus ranks nearest to the vegetable structure. The basis of the bones is at first a cellular gelatine, which, with increased oxydation, is converted into cartilage. Finally, calcareous earth is deposited in this cartilage. 2081. In the lower organized animals, who breathe for the most part by means of branchiæ, the acid combined with the calcareous earth is an inorganic, or the carbonic acid, i. e. oxygen combined with carbon, or the earthy Inflammable; in higher animals it is an organic acid or phosphoric acid, i. e. oxygen combined with phosphorus, or the aerial Inflammable. Phosphoric acid may be regarded as peroxydized gelatine, as acid of gelatine. The bone is therefore earth, salt and Inflammable. 2082. The first appearance of the osseous mass is in the oxydizing organs. It is formed from the dense or internal coat of the arteries, since in old age bony lamellæ are deposited upon this. In the hearts also of many animals bones are formed. 2083. The first regular formation of bones is exhibited in the trachea or air-tube, which has been directly exposed to the oxydizing process of the air. These first forms of the bones are rings. 2084. The antetype of the bone is, however, the intestine, as the air-vessels are the antetype of the nerves. The bone is a tube, an ossified intestine.