36 WRITINGS OF JOSEPH HENRY. [1830- 



the author had rendered the work as perfect as these au- 

 thorities and his own personal observations enabled him to 

 do, it was delivered to the surveyor-general and comptroller, 

 for revision and correction, pursuant to the act before men- 

 tioned." 



" Circulars were again addressed by the surveyor-general 

 to the several supervisors, enclosing majDS of their respective 

 towns, and requesting them to point out the errors, if any, 

 and also to suggest such additions as might be necessar}'- to 

 render the work more full and perfect. These circulars 

 were in most instances returned with much useful informa- 

 tion, which enabled the surveyor-general, with his previous 

 knowledge, to correct such errors as had escaped the obser- 

 vation of the author. This work, therefore, comprises not 

 alone the geographical knowledge of a single individual, 

 but that of many, and those the best informed by their voca- 

 tions of any in the state." * 



*This article was prepared as an introduction to the atlas of the state of 

 New- York published by David H. Burr. The section of mountains is 

 principally from my own survey. {MS. note by J. H.) 



[The plate showing the sectional elevations of the principal mountains in 

 New York, (referred to in the preceding page,) has been omitted in the 

 present re-print.] 



