THE AMERICAN GEOLOGIST. 
The only exclusively geological journal in America. 
Terms, $3.50 per year. Single numbers, 35 cents. 
EDITORS AND PROPRIETORS 
Prof. Samuel Calvin, University of Iowa, Iowa City, Iowa. Dr. Lewis E. Hicks, University of Nebraska, Lincoln, Neb. 
Prof. Edward W. Claypole, Buchtel College, Akron, O. Mr. Edward O. Ulrich, Gaol. Survey of Illinois, Newport, Ky. 
Dr, Persifor Frazer, Franklin Institute, Philadelphia, Penn. Dr. Alexander Winchell, University of Michigan, Ann Arbor, Mich. 
Prop. Newton H. Winchell, University of Minnesota, Minneapolis, Minn. 
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