Flannel in cold weather. Its use--1. As a kind of flesh brush; 2. As a protection against taking cold; 3. As means of equalizing the temperature. Clothing should be kept clean--often changed--color--lightness--softness. Cotton apt to take fire. Silk expensive. Linen not warm enough. Flannel under-clothes. SEC. 4. _Quantity._ The power of habit, in this respect. Opinion that no clothing is necessary. Anecdote of Alexander and the Scythian. Argument from analogy. Begin right, in early life. We generally use too much clothing. Should clothing be often varied?--objections to it. Avoid dampness. SEC. 5. _Caps._ How caps produce disease. Nature's head-dress. Miserable apology for caps. What diseases are avoided by going with the head bare. Judicious remarks of a foreign writer. Covering the "open of the head." Wetting the head with spirits. SEC. 6. _Hats and Bonnets._ Hats usually too warm. No covering needed in the house; and but little in the sun or rain. Is it dangerous to go with the head always bare? SEC. 7. _Covering for the Feet._ The feet should be well covered. Why. Rule of medical men. No garters. Objections to covering the feet considered. Shoes useful. Not too thick. Thick soles. Mr. Locke's opinion. SEC. 8. _Pins._ These ought not to be used. Why. Substitutes. Practice of Dr. Dewees. Needles--their danger. Shocking anecdote. SEC. 9. _Remaining Wet._ Changing wet clothing. Monstrous error--its evils. Clean as well as dry. A lame excuse for negligence. No excuse sufficient but poverty. SEC. 10. _Remarks on the Dress of Boys._ Every restraint of body or limb injurious. Tight jackets. Stiff stocks and thick cravats. Boots. Evils of having them too tight. A painful sight. SEC. 11. _On the Dress of Girls._ Clothing should be loose for girls or boys. Girls to be kept warmer than boys. Few girls comfortable, at home or abroad. Going out of warm rooms into the night air. How it promotes disease. CHAPTER V. CLEANLINESS. Physiology of the human skin. Of checking perspiration. Diseases thus produced. "Dirt" not "healthy." How the mistake originated. "Smell of the earth." Effect of uncleanliness on the morals. Filthiness produces bowel complaints. Changing dress for the sake of cleanliness. CHAPTER VI. BATHING.