Attention to all of these things means work for men and women, and for the boys and girls who wish to feel that their house is really their castle which they are defending against unseen foes. These foes are harder to fight than those who come openly and slay with the sword. They are more dangerous foes, moreover; for they are about us always, and must be fought daily. Otherwise, they will rob us of health, of comfort, of sight; they will make us the victims of disease which is ugly to look upon and painful to bear. They even take from us life itself, unless we are constantly on guard to fight their great helper, the dirt, which gathers about any neglected spot. QUESTIONS. What sort of site should be chosen to build a home upon? How should the foundation be prepared? Why is it unhealthful to live near the ground in the tropics? Why is it unwise to keep animals under the houses? What is the best sort of roof in this country? How should the kitchen be located? Why should no one be allowed to sleep in the kitchen? Why is it not healthful to sleep on the floor? How should the body be protected during sleep? How do mosquitoes cause malaria? How does the use of kerosene oil keep them away? Why should consumptives never sleep in the room with healthy persons? How should refuse matter be disposed of? What are some of the best cheap disinfectants? How should clothes be washed? How should they be dried? CHAPTER V. OUR OWN SELVES. A human being is very wonderful. Even the smallest baby is entirely separate from all the rest of the world. He is a part of the great whole, but he has his own life and separate being, just as much as the greatest man in the world. If everybody in the world did just what was right excepting one man, both that man and the rest of the world would suffer because of his doing wrong. If all the rest of the world were healthy and clean and he was not, the cleanliness and health of all the others would not save him from being dirty and unhealthy. Each one of us must do all that he can to help the rest of the world to be good and healthy and clean. Now, the first and greatest thing that any one of us can do toward this, is to do right and be healthy and clean himself.