WARREN KENDALL LEWIS

August 21, 1882-March 9, 1975

BY HOYT C. HOTTEL

WARREN KENDALL LEWIS, through his coordination of chemistry, physics, and engineering into an independent discipline to serve the chemical industry, has been called the father of modern chemical engineering. Although his contributions to basic chemical engineering principles and to chemical processing during a life of ninety-two years were many and solid, his hallmark was intense stimulation of hard thinking in others—his students, research associates, and industrial contacts. His applied chemical research and books were important, but aggressive teaching and demand of straight thinking were Lewis's characteristics most remembered by his associates of two generations. "Doc" would bring to the solution of a problem, whether educational or industrial, a sound, well-organized knowledge of physics and physical chemistry. His capacity for expression was superb and his dedication to the objective of finding the answer was obvious and intense. In any discussion, whether on science or engineering or social problems, he loved to lecture and to question.

Born on a farm in Laurel, Delaware, on August 21, 1882, Lewis transferred in his high school days to Newton, Massachusetts, for better schooling. There he met Richard C.



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