Some things again are corporeal, and others incorporeal.
1 Those are corporeal which in their own nature are tangible, such as land, slaves, clothing, gold, silver, and others innumerable.
2 Things incorporeal are such as are intangible: rights, for instance, such as inheritance, usufruct, and obligations, however acquired. And it is no objection to this definition that an inheritance comprises things which are corporeal; for the fruits of land enjoyed by a usufructuary are corporeal too, and obligations generally relate to the conveyance of something corporeal, such as land, slaves, or money, and yet the right of succession, the right of usufruct, and the right existing in every obligation, are incorporeal.
3 So too the rights appurtenant to land, whether in town or country, which are usually called servitudes, are incorporeal things.