Methods of Measuring Water Levels in Deep Wells (Techniques of Water-Resources Investigations of the United States Geological Survey, Book 8: Instrumentation)

23 pp. CONTENTS: Preface; Abstract; Introduction: Purpose and Scope, Previous Work; Methods of Water-Level Measurement Studied: Steel Tape, Electric Cable; Methods of Water-Level Measurement Studied: Air Line, Recording Devices - Surface Recording Devices, Bottom-Hole Recording Devices; Summary; References.