Chapter VII: 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