If a person once knows the weak or vulnerable points, he can outgrow them, by employing such rules of hygiene as experience has taught to be useful. There is much more benefit to be derived in an educational treatment directed to the prevention of disease, for this is also in the nature of a cure, than in a blind obedient faith in the treatment or remedy of a physician who may be ignorant, and generally is, of the laws of health or the science of hygiene. To promote health and to antagonize disease is greatly within one’s own power, because there is no doubt that most diseases are the result of imprudence that cannot be attributed to ignorance, because persons commit these errors with a full knowledge of their evil effects. A healthy habitation, that has all the advantages of pure air and sunshine, is an essential feature in regaining health and encouraging a cure. There are hundreds of persons who have been sick and miserable for years, and who have made the rounds of all the doctors they ever heard of, without the least benefit to themselves, because they were never told how to live, and their living rooms are dark and sunless and poorly ventilated. The even and equable temperature of all the rooms of a house should be kept in constant view, so that sudden and extreme changes of temperature are avoided. Warming a dwelling artificially should be one of the important features in the construction of a completely-furnished residence. This subject has been neglected, owing to the temperate climate of California, yet the moisture of the air, and the closeness with which dwellings are built in cities, exclude the rays of the sun and make houses too cold for health and comfort. In our climate we become more sensitive to the cold air than those who live in drier regions. In shaded houses and rooms, especially in damp weather, we need artificial heating as much as they do in colder climates, so that architects should make it a study to introduce a system of heating that will insure an equable temperature throughout the entire building, at a minimum of expense.