lungs well by sleeping with the windows wide open. Use plenty of bed clothes to keep warm. If your head is cold don’t pull the bed clothes over it and breathe the same air over and over; Wear a flannel night cap.
Fresh air never made anyone "catch cold." But impure air, living in houses that are too warm and close, sitting in drafts when overheated, and sitting with wet clothing and feet, will often make you catch cold. Keep warm and dry, well-fed, clean, active and cheerful, drink pure water and breathe fresh air, and you will keep well. Don’t go where you know there is anything "catching." People used to think all children had to have measles, mumps and whooping cough, and that these diseases were not serious. Now we know they are often serious, and that we may escape them. Scarlet fever and diphtheria are very dangerous. Don’t drink from a public drinking cup unless you first wash the cup thoroughly. Finally, don’t sit "humped up" in a chair, or at a school desk. Only camels are allowed to have humps.
There are four things that doctors should attend to in children who are otherwise in good health. One is: A dentist should examine the teeth twice a year. Even the "baby" teeth should be kept clean and filled with cement. That will make them last longer, keep the stomach healthier, and make the second teeth stronger and better in every way. That saves money and pain, too. Second, human beings were meant to breathe through the nose. Little boys and girls who go about with their mouths open, do so because they cannot get enough air any other way Little balls of flesh called ad’en-oids, grow in the air passage back of the nose. They must be taken out, or they will certainly make a great deal of trouble.
If there are singing or buzzing noises in the ears, if the ears ache often or pus runs from them, or you cannot hear what people say to you easily, you should go to a special ear doctor. Often ear troubles in children are easily cured, but if you neglect the trouble you may become very deaf. Your ears are your telephones, so be sure they are in good working order. Often children in school are thought to be stupid when they are only hard of hearing.
Your eyes are the windows of your soul. They should be clear and bright, for you cannot see through dim glass. If print blurs or spots dance before the eyes, if you cannot see without squinting, or know the face of a friend across the street, or if you often have a headache after studying, when you feel well in other ways, you may need
