NA TJOXA L GEOGRA FHIC MA GA ZINE 



COMMENCED JANUARY, 1888. 



TWO VOLUMES PER YEAR. 



THE AMERICAN GEOLOGIST, 



1900. 



The Oldest Exclusively Geological Magazine Published in America 



To Subscribers in the United States, Canada and Mexico $3.50 a year 



To other Subscribers in the Postal Union 4.00 a year 



The AMERICAN GEOLOGIST '\s issued monthly from the office of publication at Minne- 

 apolis, Minnesota, Unite<l States of America. Twenty-four volumes are comi)leted; the 

 twenty-fifth began with the number for January, 1900. The magazine has received a 

 cordial welcome and a generous support from leading: geologists everywhere and it is now 

 recognized as the exponent of the rapid geological progress that is taking place on 

 the continent of North America, including Canada, the United States and Mexico. No- 

 where else in the world are geologic phenomena exhibited on a more extensive scale 

 and nowliere el.-^e are results attained of greater economic and scientific imijortance. 



The AMERICAN GEOLOGIST lays before its readers from month to month the latest 

 results of geological work. In addition to the longer papers it gives synopses of recent 

 geological publications and brief notes on current geological events. 



THE GEOLOGICAL PUBLISHING CO., 



Minneapolis, Minn. 



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