PUBLISHED MONTHLY. 



COMMENCED JANUARY. 1888. 



ILLUSTRATED. 



A Strictly Geological Jouinal. 

 Two volumes of 400 pages each, per year. 



Subscription, .... $;^.^o per Year. 



Sample Copies, 20 cents. 



EDITORS AND PROPRIEfoRS. 



Samu«l Calvin, Iowa City, Iowa. 



Edward VV. Claypole, Akron, Ohio. 



John Eyerman, Easton, Pa. 

 Persifor Frazdcher. Philadelphia, Pa. I. B. Tyrrell, Ottawa, Ont. 



Robert T. Hill, Washington, D. C. R. D. Salisbury, Madison, Wis. 



Andrew C. l^awson, Kerksley, Cal. Edvvard O. Ulrich, Newport, Ky. 



I. C, White, Morgantown, W. V.n. 

 ^.^ Newton H. Winchell, Minneapolis, Minn. 



Published at Minneapolis, Minn. 



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Frei. &• Treas. Vice Pres. &* Secntary. 



Gen. MaJtagtr, 



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