A different type of illustration, though identical in Economic terminology, would be an urban residence or a building for business. Its site, the enveloping atmosphere, the space--all these are in the Economic category of Natural Resources or Land. But the building is an Artificial Object and therefore in the category of Wealth. If the building burn down or be torn down, then the property--the site and the space it commands--is in the category of Land alone. In no respect can the site and the space it commands be Wealth in the technical Economic sense--in the discriminative sense which identifies basic differences. In that sense nothing is or can be Wealth except Artificial Objects produced by Man from and upon Natural Resources. The common characteristic of Wealth in the technical Economic sense is that it consists of natural substances which have been adapted by human exertion to human uses. Another term would serve as well, but no term would serve if used also to designate something radically different. IV. SECONDARY CATEGORIES In Economic analysis Wealth takes on two aspects. They are distinguishable by secondary classifications. One is Wealth in the possession of consumers; the other is Wealth in process of utilization by Labor for the production of further Wealth. For the former no technical Economic term is in use; for the latter the technical Economic term is Capital. 1--_Capital_ Capital is a highly important technical term in Economics. It must not be confused, therefore, with the same word as loosely used in business accounts, where, like the term for its parent category, Wealth, it mingles such essentially different things as Wealth and Land--Artificial Products and Natural Resources. And, as observed in a preceding paragraph, not only such different things as Wealth and Land, but in some circumstances Labor also. Such undiscriminating uses of the term Capital are doubtless defensible enough in business accountings; for in private business anything may be thought of as business “capital” if it can be summarized in terms of Money. But for Economics as a comprehensive social science, the dumping into the same basic category of such radically different things as Labor, Land and Wealth--Man, Natural Resources and Artificial Objects--is indefensible and miraculously confusing.