2. Their existence is merely in idea and abstracted contemplation, though their effects and profits may be frequently the objects of our bodily senses. Co Litt. 9 a; Poth. Traite des Choses, 2. According to Sir William Blackstone, there are ten kinds of incorporeal hereditamenta; namely, 1. Advowsons. 2. Tithes. 3. Commons. 4. Ways. 5. Offices. 6. Dignities. 7. Franchises. 8. Corodies. 9. Annuities. 10. Rents. 2 Bl. Com. 20.
3. But, in the United States, there, are no advowsons, tithes, dignities, nor corodies. The other's have no necessary connexion with real estate, and are not hereditary, and, with the exception of annuities, in some cases, cannot be transferred, and do not descend.