CHAPTER VII. Water

WATER

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