NA TIONA L GEOGRA FHIC MA GA ZINE 



COMMENCED JANUARY, 1888. TWO VOLUMES PER YEAR. 



^rasljERICAN GEOLOGIST, 



1900. 



The Oldest Exclusively Geological Magazine Published in America 



TERIVIS. 



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



To other Subscribers in the Postal Union 400 a year 



The AMERICAN GEOLOGIST is issued monthly from the office of publication at I\Iinne- 

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

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