Study of the older models of furniture is bound to prove suggestive, and it is better to secure from the library or bookseller a book by some authority than to depend upon dealers' catalogues, which are not always edifying. English models affecting present-day outfitting date back as far as the Elizabethan period, approximately 1558-1603. Following there came the Early Jacobean, the Early Queen Anne, and the Georgian. The last includes the work of Chippendale, Heppelwhite, Sheraton, and the Adams, all of whom executed some beautiful designs. The so-called colonial furniture belongs also to the Georgian period, as does the "Debased Empire," corresponding to or following the Empire styles in France. In the latter country the periods of vogue are known as Francis Premier, Henri Deux, Henri Quatre, Louis Treize, Louis Quatorze, Louis Quinze, and Louis Seize. Under the designation of the "Quaint style" W. Davis Benn groups the "Liberty," Morris, and arts and crafts designs. Mr. Benn's "Styles in Furniture" will be found helpful in both text and illustration to those who would learn to distinguish between the products of the various periods. [Illustration: A Chippendale secretary.] MAHOGANY AND OAK Mahogany and oak are the best materials for furniture. The former is cleverly imitated in a mahoganized birch, which presents a pleasing appearance and sometimes deceives those who are not familiar with the beautiful rich tones of the genuine article. Mahogany adapts itself to almost any sensible style of interior decoration, is likely to be of careful manufacture, and is almost invariably cherished for its beauty. Like other highly finished woods it takes on a bluish tint in damp weather, and if not well protected, will demand attention more frequently than other materials. But if its purchase can be afforded the care given it will scarcely be begrudged. The eggshell (dull) finish requires less attention than the higher polish. Next in degree to mahogany, oak in the golden, weathered, or fumed effect is handsome and durable, while it is somewhat less expensive. The moment one drops below genuine mahogany, however, a wary eye must be kept upon construction. There are shifts innumerable to make cheap furniture that has an alluring appearance, and the variety of design in the moderate-priced materials will lead to confusion for those who do not exert a Spartan discrimination. SUBSTANTIALITY