2. RESPIRATORY DISEASES.--Respiratory diseases or the diseases of the throat and lungs have their origin, as a rule, in want of care and judgment in matters of clothing, bathing and exposure to cold and drafts. A child should always be dressed to suit the existing temperature of the weather. 3. NERVOUS DISEASES.--Nervous diseases are often aggravated if not caused by over-stimulation of the brain, by irregular hours of sleep, or by the use of "soothing" medicines, or eating indigestible food. 4. SKIN AFFECTIONS.--Skin affections are generally due to want of proper care of the skin, to improper clothing or feeding, or to indiscriminate association with nurses and Children, who are the carriers of contagious diseases. 5. PERMANENT INJURY.--Permanent injury is often caused by lifting the child by one hand, allowing it to fall, permitting it to play with sharp instruments, etc. 6. RULES AND PRINCIPLES.--Every mother should understand the rules and principles of home nursing. Children are very tender plants and the want of proper knowledge is often very disastrous if not fatal. Study carefully and follow the principles and rules which are laid down in the different parts of this work on nursing and cooking for the sick. 7. WHAT A MOTHER SHOULD KNOW: I. INFANT FEEDING.--The care of milk, milk sterilization, care of bottles, preparation of commonly employed infant foods, the general principles of infant feeding, with rules as to quality and frequency. II. BATHING.--The daily bath; the use of hot, cold and mustard baths. III. HYGIENE OF THE SKIN. Care of the mouth, eyes and ears. Ventilation, temperature, cleanliness, care of napkins, etc. IV. TRAINING OF CHILDREN in proper bodily habits. Simple means of treatment in sickness, etc. 8. THE CRY OF THE SICK CHILD.--The cry of the child is a language by which the character of its suffering to some extent may be ascertained. The manner in which the cry is uttered, or the pitch and tone is generally a symptom of a certain kind of disease. 9. STOMACHACHE.--The cry of the child in suffering with pain of the stomach is loud, excitable and spasmodic. The legs are drawn up and as the pain ceases, they are relaxed and the child sobs itself to sleep, and rests until awakened again by pain. 10. LUNG TROUBLE.--When a child is suffering with an affection of the lungs or throat, it never cries loudly or continuously. A distress in breathing causes a sort of subdued cry and low moaning. If there is a slight cough it is generally a sign that there is some complication with the lungs. 11. DISEASE OF THE BRAIN.--In disease of the brain the cry is always sharp, short and piercing. Drowsiness generally follows each spasm of pain. 12. FEVERS.--Children rarely cry when suffering with fever unless they are disturbed. They should be handled very gently and spoken to in a very quiet and tender tone of voice.