GENERAL GEOLOGIC RELATIONS 67
DISTRIBUTION OF UNDERGROUND WATER 68
MOVEMENT OF UNDERGROUND WATER 71
WELLS AND SPRINGS 72
COMPOSITION OF UNDERGROUND WATERS 73
RELATION OF GEOLOGY TO UNDERGROUND WATER SUPPLY 75
SURFACE WATER SUPPLIES 76
UNDERGROUND AND SURFACE WATERS IN RELATION TO EXCAVATION AND CONSTRUCTION 78
The Economic Aspect of Geology · The Wunder Library — complete classics, free to read, with narration.