If the room is not warm enough for you to do this, it is a good thing for you to strip to your waist and then to swing your arms about, much as you did in the morning, only not quite so long, and to rub your arms and neck and shoulders all over with your hands. This gives them an _air bath_, and rubs off any of the little scales of skin that may be ready to be shed, and gives you a sort of dry wash, which is next best to a wet one. Then, when you have put on your nightdress, give your hair a thorough brushing. This is the best time of the day to do it. Dust, smoke, soot, and germs have been blowing into your hair all day long, and a thoroughly good brushing will not only get these out of it before they have had time to work their way in and lodge on the scalp, but will keep the hair bright and healthy. Before you get into bed, give your nails a quick scrub with a nail brush and hot water and soap, and go over them with a _blunt_-pointed nail cleaner, cleaning out any dirt that may be under their edges, and rounding off any ragged or broken points with the file. Once a week or so, when you take your hot bath, it is a good thing to go over your toe nails in the same way, trimming them and cleaning them. Remember, however, not to round off your toe nails at the corners, but to leave them square, as in this way you will prevent them from ingrowing under the pressure of your shoes. There is one thing that you should be very sure of before you get into bed, and that is that your teeth are as clean as it is possible for you to make them. If you attended to this also directly after supper, so much the better; for just as it is important to clean the dishes and knives and forks that you have been using, so it is important to thoroughly clean the ivory knives and forks that grow in your mouth. Talk about being "born with a silver spoon in your mouth"! You were born with something much prettier and far more valuable. Even though your teeth make a firm and even line in front and on their cutting edges, yet there are many little gaps and spaces between their roots, where bits of food can stick. If these scraps of food are not thoroughly and carefully removed after each meal, the warmth and moisture in the mouth makes them begin to decay. The acids from this decay will be likely not only to upset your stomach and digestion, but to act upon the glassy coating of your teeth. After a little while, spots will begin to form on the surface of your teeth; they will lose their bright, shiny, pearly look; the acids will eat further into the teeth, and very soon there will be holes, or _cavities_.