Underground Water Supply.
Marshall O. Leighton, of the United States Geological Survey, in speaking of the decreasing underground water supply, declared that the ground water level beneath large areas has fallen 15 to 25 ft. in the last five years. Another evidence of the exhaustion of underground supply, he said, was the fact that flowing wells have ceased to flow. In Chicago the first artesian well was drilled in 1864, and the water rose 80 ft. above the surface, or m ft. above lake Michigan. The flow has long since ceased, until now the water stands 15 or 25 ft. below the surface. Mr. Leighton assigned the following causes for the decline of the underground water supply: Waste of water, surface draining by ditching for cultivation, over-development of underground waters and deforestation.