PUBLISHED MONTHLY. 



COMMENCED JANUARY 1888. 



^l]e /\mefican ©eolo^i^t, 



ILLUSTRATED. 



A Strictly Geological Journal. 

 Two volumes' of, 400 pages each, per year, 



Suhscriptinn $3.SD Per Year 



All back numbers and the subscription for 189O, $8.00. 



EDITORS AND PROPRIETORS. 



Samuel Calvin, Iowa City, Iowa. 



Edward W. Claypool, Ak?-on, Ohio. 



John Eyerman, Easion, Pa. 

 Persir«)r Frazer, Philadelphia. Pa. Robert Hay, /unction City. Kansas. 



Clarence L Herrick. Cincinnati, O Arthur Lakes, Golden, Col. 



Andrew C Lawson, Ottawa, Ont. Edward O. Ulrich, Nrioport, Ky. 



I. C. White, Morgantown. W Va 



Alexander Wincbell, Ann Atbor. Mfch. 



Newton H. W; a 'hell, Minneapolis, Minn. 



Published at Minneapolis, Minn, 



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I2th Edition of Illustrated Catalogue free on 

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/ 



Ne.v Pftrograpiiicae Microscope — Made by advice 

 and assistance of Prof. Geo. H. Williams, Johns Hop- 

 kins University. 



