Frank Wigglesworth Clarke died at his residence in Washington, D. C., on May 23, 1931, two months after he passed his eighty-fourth year. Retired from Government service on January 1, 1925, he had been Chief Chemist of the U. S. Geological Survey for a long span of time, having been appointed in 1883. During the same time he was honorary Curator of minerals in the United States National Museum but he took a much more active interest in his curator-ship than would be inferred from that title, and the excellence and comprehensiveness of the mineral collection in the Museum are due in large measure to this active interest and to his painstaking efforts both in the collection and exhibition of specimens.

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