DISCUSSION. THE PERIODICAL ALTERATIONS AND PROGRESSIVE PERMANENT DEPRESSION, OF THE CHALK WATER LEVEL UNDER LONDON. (INCLUDES PLATE).

Keywords: WATER, LEVELS, CHALK, GROUNDWATER, GEOLOGY, DEPRESSIONS, WELLS, CITIES, WATER RESOURCES, WATER SUPPLY, BASINS, SAND, FISSURES, ARTESIAN, PUMPING, ABSTRACTION, ALTERATIONS, LONDON, UK