The first of these rules is: _Do not go into the room where any one is sick unless it is absolutely necessary_. No one but the nurse should sleep in the room with a sick person. We know that certain diseases are communicable (catching), but it has not yet been determined whether some others are communicable or not. It has not been proved, for instance, that we cannot catch rheumatism from another person. Only a few years ago it was believed that one could not take consumption from another person, but now we know that this is the very way to get it. Therefore, stay away from sick people as much as possible. It is not good for the patient to have people around him, and it is dangerous for the well to come in contact with the sick. [Sidenote: Not using things used by the sick] The second rule is: _Do not use anything used by a sick person until it has been washed_. This is a good rule to apply to things used by a well person also. It is neither safe nor pleasant to eat from the spoon or fork, or to use the napkin or towel which has been used by someone else. Sometimes children think the food prepared for a sick person is ever so much nicer than that set before themselves, and wish they could have a little of it. How often have we seen a sick mother give her little ones "a taste" from the spoon with which she is eating. This is very dangerous, and if she knew it, the mother would cut her hand off before exposing her children to this danger. [Sidenote: Reason for scalding things used by the sick] Third: _Everything taken from a sickroom should be boiled before it is used again_. The knives, forks, and plates should not be put with other dishes until after they have been separately washed and boiled. Towels, napkins, bedding, and clothing from a sickroom should not be washed with other bedding and clothing, but should be washed and boiled separately. Some people send out the clothes from the sickroom with the rest of their washing, and in this way give disease to others. [Sidenote: How excreta from the sick should be treated] Fourth: _All discharges (sputum, urine, bowel discharges, and matter from sores) from any sick person should be thoroughly disinfected before being finally disposed of_. The sputum should be received on little rags or paper napkins, and burned; and the other discharges should be disinfected with some poison that will kill the germs. We shall say more about disinfection when we come to study the prevention of special diseases. [Sidenote: Necessity of washing the hands after touching the sick] Fifth: _Every person who touches a sick person, or handles anything that comes from a sickroom, should immediately wash his hands_. Unless he washes his hands at once, the germs which may be on them may get into his mouth. [Sidenote: How dirt causes disease]