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13 together there is Effectual value, or wealth; where there is either no intrinsic value, or no acceptant capacity, there is no effectual value; that is to say, no wealth. A horse is no wealth to us if we cannot ride, nor a picture if we cannot see, nor can any noble thing be wealth, except to a noble person. As the aptness of the user increases, the effectual value of the thing used increases; and in its entirety can co-exist only with perfect skill of use, and fitness of nature.

15. Valuable material things may be conveniently referred to five heads: (i.) Land, with its associated air, water, and organisms.

(ii.) Houses, furniture, and instruments.

(iii.) Stored or prepared food, medicine, and articles of bodily luxury, including clothing.

(iv.) Books.

(v.) Works of art.

The conditions of value in these things are briefly as follows:—

16. (i.) Land. Its value is twofold; first, as producing food and mechanical power; secondly, as an object of sight and thought, producing intellectual power.