There are other ways of having filth inside a house besides having dirt in heaps. Old papered walls of years' standing, dirty carpets, uncleansed furniture, are just as ready sources of impurity to the air as if there were a dung-heap in the basement. People are so unaccustomed from education and habits to consider how to make a home healthy, that they either never think of it at all, and take every disease as a matter of course, to be "resigned to" when it comes "as from the hand of Providence;" or if they ever entertain the idea of preserving the health of their household as a duty, they are very apt to commit all kinds of "negligences and ignorances" in performing it. [Sidenote: Light.] 5. A dark house is always an unhealthy house, always an ill-aired house, always a dirty house. Want of light stops growth, and promotes scrofula, rickets, &c., among the children. People lose their health in a dark house, and if they get ill they cannot get well again in it. More will be said about this farther on. [Sidenote: Three common errors in managing the health of houses.] Three out of many "negligences, and ignorances" in managing the health of houses generally, I will here mention as specimens--1. That the female head in charge of any building does not think it necessary to visit every hole and corner of it every day. How can she expect those who are under her to be more careful to maintain her house in a healthy condition than she who is in charge of it?--2. That it is not considered essential to air, to sun, and to clean rooms while uninhabited; which is simply ignoring the first elementary notion of sanitary things, and laying the ground ready for all kinds of diseases.--3. That the window, and one window, is considered enough to air a room. Have you never observed that any room without a fire-place is always close? And, if you have a fire-place, would you cram it up not only with a chimney-board, but perhaps with a great wisp of brown paper, in the throat of the chimney--to prevent the soot from coming down, you say? If your chimney is foul, sweep it; but don't expect that you can ever air a room with only one aperture; don't suppose that to shut up a room is the way to keep it clean. It is the best way to foul the room and all that is in it. Don't imagine that if you, who are in charge, don't look to all these things yourself, those under you will be more careful than you are. It appears as if the part of a mistress now is to complain of her servants, and to accept their excuses--not to show them how there need be neither complaints made nor excuses. [Sidenote: Head in charge must see to House Hygiene, not do it herself.]