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Dr. Harbaugh describes the work of water, the most important agent at work in forming the finer features of the face of the Earth. He describes the hydrologic cycle: the round trip that water takes in evaporating from the ocean, precipitating on the land, and flowing back to the ocean. His guest is Ray K. Lindsey, associate professor of hydraulic engineering at Stanford University. Formerly a member of the faculty of the U.S. Department Graduate School and the University of California, he was a participant in the UNESCO Symposium on Hydrology in Ankara, Turkey (1952) and UN consultant to the Yugoslavian Hydro-matero-logical service. They discuss the mechanics of water: the way it can suspend materials and carry them along.
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