vi CONTENTS 



CHAPTER VII. 

 LOCATION AND MOVEMENTS OF UNDERGROUND WATERS. 



Fallacy of tin- divining rod. Basis of scientific location of underground waters. 

 The water-table. Movements of ground waters. Movements of shallow rock 

 waters. Movements and depth of deep seated waters. 



CHAPTER VIII. 

 ARTESIAN FLOWS. 



Requisites of artesian flows. Flows from sands and sandstones. Flows from gla- 

 cial materials. Flows from limestones. Flows from granites. Flows from 

 traps and lavas. Location of flowing wells. Relation of depth to flows. 



CHAPTER IX. 

 WATER PROVINCES OF THE UNITED STATES. 



Principal water provinces. Area of Glacial Drift. Weathered rocks. The Atlantic 

 Coastal Plain. The Piedmont plateau. Appalachian Mountains. The 

 Mi>>issippi-Great Lakes basin. The High Plains. The Rocky Mountain 

 province. The Great Basin. The Pacific provinces. 



CHAPTER X. 

 TYPES OF WELLS. 



Types of wells. Types of curbings and casings. Selection of type of well. Yield 

 as a factor in determining type of well. Relation of depth of water to type of 

 well. The cost factor. Comparative safety of types. 



CHAPTER XL 

 DUG WELLS. 



Advantages and disadvantages of dug wells. Importance of proper location of dug 

 wells. Sources of pollution. The "safety distance" factor in the location of 

 dug wells. Best situations for dug wells. Size and depth of wells. Digging 

 the well. Protection of dug wells. Cleaning the well. 



CHAPTER XII. 

 BORED AND PUNCHED WELLS. 



Advantages and disadvantages. Location and protection of bored and punched 

 - Sinking the bored well. Sinking punched wells. Depth of bored and 

 punched wells. Cleaning bored and punched wells. 



