Before retiring all the clothes worn during the day should be removed. The night apparel should be light--cotton, linen or silk. The bed should be comfortable, but not too soft. There should be enough covering to keep the sleeper comfortably warm, but not hot. Those who cover themselves with so many quilts or blankets that they perspire during the night are not properly refreshed. It prevents sound sleep and makes the skin too sensitive. It reduces a person's resistance to climatic changes. The feet should be kept warm, even if necessary to put artificial heat in the foot of the bed. During cold weather the feet and the legs should have more covering than the rest of the body. From the waist up the covering should be rather light. Sound sleep is dependent on relaxation of mind and body. Those who live the day over after going to bed do not go to sleep quickly or easily. This habit should be overcome. Do business at the business place, during business hours, if you would have the mind fresh. There are days so full of cares that the night does not bring mental relaxation, but those who have begun early in life to practice self-control find these days growing fewer as the years roll by. When they learn their true relationship to the rest of humanity, to the universe and to eternity, they are generally willing and able to let the earth rotate and revolve for a few hours without their personal attention. They realize that worry and anxiety waste time and energy. Many complain that they can not sleep. This they repeat to themselves and to others many times a day. At night they ask themselves why they can not sleep. They do it so often that it becomes a powerful negative suggestion frequently strong enough to prevent their going to sleep. It is an obsession. Real insomnia exists only in the mind of the sufferer. Every physician, sooner or later, has experience with people who say that they can not sleep. The doctors who give such patients sleeping powders or potions make a grave mistake. These drugs are taken at the expense of some of the physical structures, and the day of settlement always comes. Perhaps it will find the patient with bankrupted nerves or a failing heart. To be effective, the size of the dose must be increased from time to time. At last the result will be some disease, either physical or mental. Those who insist that they "do not sleep at all," or that they sleep "but a few minutes" each night, sleep a few hours, but they make themselves believe that they do not sleep. We are compelled to sleep, and even those who "do not sleep at all" can not remain awake indefinitely.