12. Object and Division of Chapter II. -- By the matter or material cause of logical order we mean what this order consists of (id ex quo aliquid fit) the materials to be used in constituting it.
The elementary materials are concepts (Article I) and terms (Article II).
Article I will treat of: the concept, its object, its properties (§ 1); the division of concepts (§ 2). Article II will have a parallel division.