Most important among these was an 1893 calculation by Clarence King, the first director of the US Geological Survey who, again basically using Kelvin's thermal methods, arrived at a figure of 24 million years. In a paper in 1897,
London : Sampson Low, Marston, Low, & Searle, 1872. 292 p. 19 cm. Callumber: F868.S5 K542 1872 Location: UNR Special Collections.
Major Exhibition of Photographs by Timothy H. O'Sullivan Opens at
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