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Rh by every kind of living creature that can occupy it in peace, is the most precious "property" that human beings can possess.

17. (ii.) Buildings, furniture, and instruments.

The value of buildings consists, first, in permanent strength, with convenience of form, of size, and of position; so as to render employment peaceful, social intercourse easy, temperature and air healthy. The advisable or possible magnitude of cities and mode of their distribution in squares, streets, courts, etc.; the relative value of sites of land, and the modes of structure which are healthiest and most permanent, have to be studied under this head.

The value of buildings consists secondly in historical association, and architectural beauty, of which we have to examine the influence on manners and life.

The value of instruments consists, first, in their power of shortening labour, or otherwise accomplishing what human strength unaided could not. The kinds of work which are severally best accomplished by hand or by machine;—the effect of machinery in gathering