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Rh Courtesy, Agricultural Extension Dept., International Harvester Co.

THE COMMON HOUSE FLY

may be full of disease germs and most unsafe to drink. It will be better to carry some bottles of cooled, boiled water when you go for a hike or a nutting party than to drink from a spring, no matter how clear it looks.

We must be very careful not to do any-thing that will contaminate the public water supply. Waste material that will decay should never be thrown in a lake or reservoir which is piped for home use. Your garbage thrown carelessly into a river may cause illness a long distance away. Sewage is washed back and forth by the action of the currents for many days and causes the water to be badly poisoned. Such a condition is a health menace, especially in fresh water streams or lakes where the polluted water reaches the supply of seme other town.

Boys and girls can fight other community disease carriers. Almost the worst of these is the common house fly. One does not realize to look at it, how much harm one fly can do. Its eggs,