Chapter VII · WATER
Reading edition
WATER
GENERAL CONSIDERATIONS
Necessity for Proper Supply History of Public Supply Composition of Water CHEMICAL ELEMENTS FOREIGN INGREDIENTS States of Aggregation Universal Solvent Necessity for Water in Body Chemically Pure Water HOW OBTAINED TASTE OF WATER Hard and Soft Water PERMANENT TEMPORARY Elimination of Water from Body Amount of Water Needed for All Purposes FOR THE BODY FOR DOMESTIC PURPOSES FOR CITY USE Water Waste CAUSES FOR USES OF METERS
SOURCES OF WATER SUPPLY
Rain Water SUPPLY NOT RELIABLE EASILY POLLUTED FILTERING NECESSARY DESIRABLE FOR LAUNDRY PURPOSES Surface Water STREAMS LAKES IMPOUNDING RESERVOIRS SOURCES OF IMPURITIES IN SURFACE SUPPLY Ground or Subsoil Water WELL WATER SPRING WATER TEMPERATURE IN WELLS SHALLOW AND DEEP WELLS CONSTRUCTION OF WELLS SOIL AS A FILTER
METHODS OF PURIFICATION
Natural Methods of Water Purification BY FREEZING SELF-PURIFICATION WATER VEGETATION DILUTION STORAGE AND SEDIMENTATION SUNLIGHT Artificial Methods of Water Purification DISTILLATION BOILING FILTRATION CHEMICAL PURIFICATION Swimming Pools SANITATION OF SWIMMERS INSTRUCTED IN POOL SANITATION
SEWAGE AND REFUSE DISPOSAL
Methods of Sewage Disposal DRY WET Sewage Purification SCREENED SEPTIC METHOD Refuse Disposal INCINERATION CITY COLLECTORS
CHAPTER VII
WATER