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WASHINGTON, D.C.
Meeting 459
Cosmos Club
Wednesday, January 22, 1930
George Rogers Mansfield, President Carle Hamilton Dane, Meeting Secretary
Herbert Eugene Merwin—Geophysical Laboratory—The sulphides of copper and iron.
Henry Gardiner Ferguson—USGS—Vein quartz of the Allegheny District, California.
William Clinton Alden—USGS—Columbia River terraces and their significance.
Attendance: 45
Minutes not available.
Published account of meeting appears in: J. Wash. Acad. Sci. 20, 151-153