ACCESSION, property. The ownership of a thing, whether it be real or personal, movable or immovable, carries with it the right to all that the thing produces, and to all that becomes united to it, either naturally or artificially; this is called the right of accession.

2. – 1. The doctrine¹ of property arising from accession, is grounded on the right of occupancy.

3. – 2. The original owner of any thing which receives an accession by natural or artificial means, as by the growth of vegetables, the pregnancy² of animals; Louis. Code, art. 491; the embroidering³ of cloth, or the conversion⁴ of wood or metal into vessels⁵ or utensils⁶, is entitled to his right of possession to the property of it, under such its state of improvement; 5 H. 7, 15; 12 H. 8, 10; Bro. Ab. Propertie, 23; Moor⁷, 20; Poph. 88. But the owner must be able to prove the identity of the original materials; for if wine, oil, or bread, be made out of another man's grapes, olives, or wheat, they belong to the new operator, who is bound to make satisfaction to the former proprietor⁸ for the materials which he has so converted. 2 Bl. Com. 404; 5 Johns. Rep. 348; Betts v. Lee, 6 Johns. Rep. 169; Curtiss v. Groat, 10 Johns. 288; Babcock v. Gill, 9 Johns. Rep. 363; Chandler v. Edson, 5 H. 7, 15; 12 H. 8, 10; Fits. Abr. Bar. 144; Bro. Abr. Property, 23; Doddridge Eng. Lawyer, 125, 126, 132, 134. See Adjunction; Confusion of Goods. See Generally, Louis. Code, tit. 2, c. 2 and 3.

ACCESSION, international law, is the absolute or conditional⁹ acceptance by one or several states, of a treaty already concluded between one or several states, of a traty already concluded between other sovereignties. Merl. Rep. mot Accession.

ACCESSORY, property. Everything which is joined to another thing, as an ornament¹⁰, or to render it more perfect, is an accessory, and belongs to the principal thing. For example, the halter of a horse, the frame of a picture, the keys of a house, and the like; but a bequest¹¹ of a house would not carry the furniture in it, as accessory to it. Domat, Lois Civ. Part. 2, liv. 4, tit. 2, s. 4, n. 1. Accesiorium non ducit, sed sequitur principale. Co. Litt. 152, a. Co. Litt. 121, b. note (6). Vide Accession; Adjunction; Appendant; Appurtenances; Appurtenant; Incident.