If there is one sweet morsel above another for this fly pest it is tubercular sputum or feces, and from these feasts they go directly to walk over baby's hands, crawl over his cheek, and wash their feet in his milk. Proper screenage will prevent such contamination of food, such opportunities for carrying disease. Sunshine, hot water, soap, and fresh air, are the best ordinary every-day disinfectants. It is possible so to conduct the treatment of a contagious or infectious disease that no other member of the family may contract it. A few simple but very important hints are: 1. Door knobs are one of the very greatest avenues of contagion--disinfect them. 2. Cleanse the hands both before and after attending to the sick; first, scrub with stiff brush, soap and water, then dip in alcohol. 3. An epidemic of sore eyes may be stopped by absolute "hand disinfection" and using separate towels. 4. Do not go visiting when you have a "common cold." 5. Kissing is one of the best ways of spreading many diseases. 6. In cases of contagious and infectious diseases completely cover all excretions from the body with lime. 7. Country homes would be as healthy as city homes if the privies and stables were screened. 8. In the country, the well water should be boiled; one infected well may be the cause of the death of a score of beautiful children. INCUBATION PERIODS The incubation period of scarlet fever is from one to seven days. Measles, ten to twenty days. Whooping cough, from one to two weeks. Chicken-pox, fourteen to sixteen days. German measles, seven to twenty-one days. Diphtheria, any time from one to twelve days. Mumps, from one week to three weeks. Of all the diseases, measles and chicken-pox are probably the most contagious. In scarlet fever and diphtheria, close contact is necessary for exposure, while whooping cough can actually be contracted in the open air, young babies being particularly susceptible. TYPHOID FEVER Typhoid fever is a disease of the small intestine. Typhoid germs accumulate in the little lymph nodes of the small intestines and that is the reason why we often have so many hemorrhages from the bowel--actual ulcerations take place--and if an ulcer is situated in the neighborhood of a blood vessel hemorrhage may result. Typhoid fever begins rather insidiously with a slight debility and loss of appetite, but if a temperature record is kept the fever will be found to rise from one-half to a degree higher each day. A steady climb in the temperature curve is noted until the end of the first week, when it remains for a week, possibly 103 or 104 F. After one week it begins slowly to decrease and, if all goes well, the early part of the fourth week usually finds the temperature about normal. It is exceedingly important that the child be kept in bed during the entire course of the disease. The bed pan must be used at each bowel movement or urination.