The necessity and meaning of light and cleanliness, the indifference of the human body to all natural changes of temperature, when strengthened and maintained in health by wholesome food and efficient bathing, might lead to the taking of effective measures to restore the old Roman bath to general use. As regards shelter, why a building on the ground is generally to be preferred to a cave or shelter in the ground--what materials are best adapted for roofs, what for walls, floors, windows, why we use stone or brick in one part of the country and wood in another; what sizes, shapes, means of warmth and ventilation, for privacy and social enjoyment, should be adopted, and as regards furniture and utensils, what are most suitable for the several parts of a dwelling; what should guide our selection of material, fabrics, shape, size and pattern; how to establish a communication from one part of a building to another; how water and light are to be had most readily. All these things should form the subject of school study and inquiry. The means of locomotion, how streets, roads and paths should be laid out and maintained; the construction and use of carriages, cars, wagons, tramways, railroads, ships, steamers, propelling power; where bridges should be built, and how; viaducts and embankments to cross valleys, cuttings and tunnels to penetrate hills and mountains; these, too, simply at first, and afterwards in more elaborate detail, should form subjects of school instruction, the rules determining the selection of each and the methods of their construction not being preached in lectures, _ex Cathedra_, but evolved by a patient questioning of nature, by experiment and the Socratic method of inquiry. Exercise of the limbs under the direction of a skilled instructor, so that all the muscles of the body may be duly trained, and a healthy body built up to support a healthy mind. The kinds of recreation to be selected, whether bull-baiting, cock-fighting, rat-catching or prize-fighting, should be preferred to games of skill and strength, to the drama, literature, works of art, public walks, gardens, and museums; the comparative influence of all these upon the health, strength, courage, activity, humanity, refinement and happiness of society; how people may be led to prefer such as tend to general well-being to those which have a tendency to brutalize and debase. All these also should be dwelt upon in the school.