Jt:i<AMZ^ d^ . COkU^ 



DBPAETMKNT OF TKK INTKKIOU 



liULLETTN 



UNITED STATES 



GEOLOGICAL SURVEY 



No. 97 



TKK MKSO/OIC I'X'HINUUEKMATA Ol-^ TIIH UNITED STATES 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 

 1893 



