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NEW YORK STATE MUSEUM 



some of his views have been slightly modified. The present re- 

 port, therefore, wherever it differs from preceding papers or 

 reports, must be taken to represent his latest views. 



In order to make this treatise as complete as possible, the 

 Report on the Relation of Rainfall to Runoff, published in 1903 

 by the United States Geological Survey, is herewith included, so 

 far as applying to the State of New York. Extended excerpts 

 on floods have been made from the report of the Water Storage 

 Commission. 



The discerning reader will observe an occasional repetition. A 

 few such have been made, either to save too frequent reference 

 to a preceding page, or where a different phase of a subject has 

 been discussed. Where the subjects are similar, references thereto 

 have been frequently made by a foot-note. The object of the 

 repetition is to reduce the labor of reading to a minimum. 



The writer is indebted to the Niagara Falls Hydraulic Power 

 & Manufacturing Company, the Niagara Falls Power Company, 

 the St Lawrence Power Company, the Hudson River Power Trans- 

 mission Company, the Hudson River Water Power Company, the 

 Empire State Power Company, the Utica Gas & Electric Com- 

 pany, the Hannawa Falls Power Company and the International 

 Paper Company for photographic illustrations for this report. 



The writer wishes to specially acknowledge his indebtedness to 

 the Report on Stream Flow and Water Power, made since 1900 by 

 the State Engineer and Surveyor, acting in conjunction with the 

 Hydrographic Division of the United States Geological Survey. 

 These reports have been compiled by Mr Robert E. Horton. 



Rochester, April 1, 1904. 



George W. Rafter. 



