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Nature volume 31, pages 256258 | Download Citation



The American Journal of Science, December 1884.—The distribution and origin of Drumlins, by W. M. Davis. The term drumlin is here taken in a generic sense to include any kind of more or less smoothly-rounded hills formed by local accumnlatian of glacial drift on a foundation of different geological formation. The subject is treated under five heads:—(1) the place of drumlins in a geographical classification; (2) terminology: (3) general description; (4) distribution; (5) origin. —The geological relations and genesis of the specular iron ores occurring in the Sierra Maestra (Coast Range) of the district of Santiago de Cuba, by James P. Kimball.—A new tantalite locality, by Charles A. Schaeffer. The author describes a mineral from the Etta tin mine, Dakotah, hitherto supposed to be casiterite, but which is shown to be tantalite. The analysis gave the following results:—

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