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WASHINGTON, D.C.
Meeting 474
Cosmos Club
Wednesday, February 25, 1931
Oscar Edward Meinzer, President Arthur Maine Piper, Meeting Secretary
Philip Burke King—USGS—Geology of the Marathon District, Texas.
William Walden Rubey—USGS—The Illinois River, a problem in channel equilibrium.
Nicholas Hunter Heck—US Coast and Geodetic Survey—Some recent developments in the field of seismology.
Attendance: 63
Minutes not available.
Published account of meeting appears in: J. Wash. Acad. Sci. 21, 365-372