18 



NEW YORK STATE MUSEUM 



In 1SS2 Dr Hall prepared a small black and white geologic 

 map of the state on the scale of 38 miles to the inch to accom- 

 pany a publication entitled Public Service of the State of New 

 York. 



In 1894 an "Economic and Geologic Map of the State of New 

 York " was prepared by F. J. H. Merrill to illustrate the report 

 of the board of managers of the exhibit of the State of New 

 York at the World's Columbian exposition. The scale was 14 

 miles to the inch, and the detail was necessarily much general- 

 ized, but in some areas the geologic boundaries were based on 

 more recent data than those shown on the large map prepared 

 under the direction of Prof. Hall. 



A later edition of this map was published in bulletin 15 of the 

 New York State Museum, and a reprint of this edition is con- 

 tained in the report on barge canal by the state engineer, 19.01, 



The geographic base of 1894 



The base of 1894 was prepared for Prof. Hall in Washington 

 under the direction of Mr W J McGee, from such cartographic 

 material as was available at that date. The manuscript draft 

 of the base was prepared by Messrs Klemroth and Torbert on 

 the same scale as that of the publication. The engraving was 

 done on copper by expert engravers of the United States Coast 

 and Geodetic Survey, temporarily unemployed. 



While this map is very beautifully engraved, it is not wholly 

 accurate in its geography, owing to the incompleteness of the 

 surveys of the state and the lack of good compilations of such- 

 surveys as had been carefully made. 



An edition of 1000 copies was printed. 



The geographic base of 1901 



The lack of accurate geographic information concerning New 

 York state at the time of the compilation of the base of the 

 Hall map rendered it necessarily inaccurate and, though beau- 

 tifully engraved on copper, the errors were so numerous, which 

 could be corrected through the availability of later surveys at the 

 time of preparing the new edition, that the cost of correcting the 



