GEOLOGY OF THE NEW YORK CITY AQUEDUCT 7 



kill division, J. S. Langthorn of the Ashokan reservoir, Wilson 

 Fitch Smith of the Kensico division, T. C. Atwood of the New 

 York city delivery division. 



The data included in the tabulation of this bulletin have been 

 gathered largely by others. Many of the explanations and conclu- 

 sions are the outgrowth of the work of engineer and geologist, 

 together. A large number of associates are engaged on this public 

 work in such relations to one another that the individuality of each 

 is obscured in the common effort to reach an enviable efficiency and 

 success for the whole enterprise. 



The combined efforts of man}^ unselfishly given, have thus 

 brought together a total far in excess of what any one individual 

 could accomplish. Acknowledgments should therefore be made to 

 those members of the staff of the Board of Water Supply who can 

 not in the nature of the case be mentioned by name. Were it not 

 for their cooperation the great mass of data here summarized could 

 not have been compiled. 



Charles P. Berkey 

 Special Geologist, New York State Geological Survey ; 

 Consulting Geologist Neiv York City Board of Water Supply 

 Columbia University, New York City November i, 1910 



