Accessio

Lat. [from accedere, to go to or with; to be added to, to belong to.] In the civil law. Accession; a going or passing of one thing to, or with another as its principal; an addition, or increase.

— That mode of acquiring property by which according to the rule, Res accessoria sequitur rem principalem, (an accessory thing follows the principal thing,) or cedit rei principali (belongs to the principal thing,) the proprietor of the principal thing becomes, ipso jure, proprietor of all that belong to it, [or is added to, or connected with it,] as an accessory thing; whether such addition be by its own increase, as the fruits of the earth, the young of animals;

— or the operation of natural causes, as the gradual deposit, (alluvio,) made upon land by a stream;

— or by the voluntary act of another uniting his property with it, (adjunctio;) as by the interweaving of materials, welding of iron, painting on another's tablet, writing on his parchment, building or planting on his soil;

— or by the mixing together of things dry, (commixtio,) or liquid, (confusio.) Inst. 2.

1. 26 — 38.

Bract, fol.

9 a. 10 a. 1 Mackeld. Civ. Law, 279—286, §§ 266—270.

See Adjunctio. The mode of acquisition by transforming a thing belonging to another, especially by working up his material into a new species, as grapes into wine, was called specificatio, and was distinguished from accessio, properly so called.

1 Mackeld. Civ. Law, 277, § 265.

See Specificatio. The Romans did not use the word accessio to denote the title arising from the addition of one thing to another, but understood by it the thing itself which comes to be joined to another.

1 Mack. Civ. Law, 279, § 266, note (d). Id. 155, § 163.