LETTER OF TRANSMITTAL. 
Department of the Interior, 
United States Geological Survey, 
Washington, D. C.,June 7, 1905. 
Sir: I transmit herewith the manuscript of a bibliography and index 
of North American geology, paleontology, petrology, and mineralogy 
for the year 1904, and request that it be published as a bulletin of the 
Survey. 
Very respectfully, 
F. B. Weeks. 
Hon. Charles D. Walcott, 
Director United Stairs Geological Survey. 
