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<br />United States Department of the Interior <br /> <br />ROGERS C. B. MORTON, Secretary <br /> <br />, <br />I <br /> <br /> <br />Geological Survey <br />v, E. MeKelvey, Director <br /> <br />F_ on application to tile u.s. Geotogical Su...." Notional Conle', Roston, Va. 22092 <br />