Heinrich Ries

Heinrich Ries, Ph.D. (1871–1951) was an American economic geologist, born in Brooklyn, New York, and educated at Columbia University and at the University of Berlin. He was employed principally at Cornell University, initially as an instructor (1898-1902), as an assistant professor (1902-1905), as professor, and as head of the geological department (1915- ). Professor Ries made numerous reports on clay published by the United States Geological Survey, the New York State Geological Survey and the Canadian Geological Survey. He was the author of:
* "Economic Geology of the United States" (1905; third edition, revised, 1911)
* "Clays: Their Occurrence, Properties, and Uses" (1906, second edition, 1908)
* "Clays of Texas" (1908)
* "History of Clay-Working Industry in the United States" (1909), with Henry Leighton
* "Building Stones and Clay Products" (1912)
* "Engineering Geology" (1914; second edition, revised, 1915)