UNITED STATES GEOLOGICAL SURVEY 
UHAKLES D. WALCOTT, DIKECTOlt 
BIBLIOGRAPHY AND INDEX 
OF 
NORTH AMERICAN GEOLOGY, PALEONTOLOGY, 
PETROLOGY, AND MINERALOGY 
THE YEAR 1894= 
FRED BOUGHTON WEEKS 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
18<J0 
