CHAPTER VII

WATER SUPPLY 125

Water Analysis--Pokegama Water--River Water--Artesian Water--Medical Water--Organic Matter--Ammonia--Hardness in Water--Iron in Water--Water Softening With Hydrated Silicates--Chlorine--Polluted Water--Pollution of Wells--Safe Distance in the Location of Wells--Surface Pollution of Wells--Water Table--The Divining Rod--Selection of a Type of Well--Flowing Wells--Construction of Wells--Dug Wells--Open Wells--The Ideal Well--Coverings of Concrete--Artesian Wells--Driven Wells--Bored Wells--Cleaning Wells--Gases in Wells--Peculiarities of Wells--Breathing Well--Freezing Wells--Pumps--The Lift Pump--The Force Pump--Tank Pump--Well Pumps--Wooden Pump--Pumps for Driven Wells--Deep-well Pumps--Tubular Well Cylinders--Chain Pumps--Rain Water Cisterns--Filters--The Hydraulic Ram--Single-acting Hydraulic Ram--The Double-acting Hydraulic Ram--Domestic Water-supply Plants--Gravity Water Supply--Pressure-tank System of Water Supply--The Pressure Tank--Power Water-supply Plants--Electric Power Water Supply--The Water Lift.