2. Contributions are of three kinds, namely: first, those which arise from persons on account of their property, real or personal, or which are imposed upon their industry - those which are laid on and paid by real estate without regard to its owner; and - those to which personal property is subject, in its transmission from hand to hand, without regard to the owner. See Domat, Dr. Publ. 1. 1, t. 5, s. 2, n. 2.
4. By contributions is also meant forced levy of money or property by a belligerent in a hostile country which he occupies, by which means the country is made to contribute to the support of the army of occupation. These contributions are usually taken instead of pillage. Vatt. Dr. des Gens, liv. 3, 9, 165; Id. liv. 4, c. 3, 29.