LETTER OF TRANSMITTAL 
Department of the Interior, 
United States Geological Survey, 
Washington, D. C., February 1^ 1905. 
Sir: I transmit herewith the manuscript of a report on "The Con- 
figuration of the Rock Floor of Greater New York," by William H. 
Hobbs, and recommend its publication as a bulletin. 
The report contains a large amount of geological information of the 
highest importance to engineers engaged in construction work in New 
York involving excavations for foundations and other purposes. The 
facts are presented by both verbal and graphic means in such a man- 
ner as to be most useful to the engineer, and at the same time to be 
highly suggestive and valuable to the student of geology. 
Very respectfully, 
C. W. Hayes, 
Geologist hi ( 'harge of Geology. 
Hon. Charles D. Walcott, 
Director United States Geological Survey. 
