Marvin, Charles Frederick, 1858–1943, American meteorologist, b. Putnam (now part of Zanesville), Ohio, grad. Ohio State Univ., 1883. He entered (1884) the U.S. Signal Service, predecessor of the Weather Bureau, which he helped to develop and later directed (1913–34). He is especially noted for his work on humidity tables and on the measurement of wind velocity, for the invention and improvement of meteorological instruments, and for his advocacy of calendar reform.
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