2. Things capable of being possessed by a single person exclusively of all others, are, in the Roman or civil law, said to be in patrimonio; when incapable of being so possessed they are extra-patrimonium.

3. In general, things may be inherited, but there are some which are said to be extra patrimonium, or which are not in commerce. These are such as are common, as the light of heaven, the air, the sea, and the like. Things public, as rivers, harbors, roads, creeks, ports, arms of the sea, the, sea-shore, highways, bridges, and the like. Things which belong to cities and municipal corporations, as public-squares, streets, market houses, and the like. See, 1 Bouv. Inst. n. 421 to 446.