PREFACE. 



and advice, but for gratuitous aid and influence which could only arise from a 

 deep personal interest in the beneficial results of the Survey. The Hon. Archi- 

 bald INIcIntyre, and Mr. David Henderson, are entitled to my warmest thanks 

 for supplying the means of exploring the forests and mountains of Essex. I have 

 received essential aid from Dr. Crawk, of Watertown, in collecting the fossils of 

 the Trenton limestone. Dr. Benton, of Oxbow, has freely assisted me while in 

 his neighborhood ; and the same acknowledgment is due to Dr. Murdock, for- 

 merly of Gouverneur. Prof F. Benedict, of the University of Vermont, volun- 

 teered his services to complete the exploration of the mountains of Essex, which 

 had been commenced b}- myself : the result of his labors speaks for itself in this 

 volume. Mr. Redfield has also contributed largely to the same object. I was 

 assisted during parts of two seasons, by my friend Prof A. Hopkins, of Williams 

 College. He was engaged principally in magnetic observations ; and though 

 many important facts were discovered, the series of observations were considered 

 by himself as too imperfect to be published. Mr. Richard Taylor also accom- 

 panied me to the iron mines of Adirondack, and from him I received many useful 

 hints and suggestions. Mr. Edwards Hall rendered me efficient service as an 

 assistant during one season. My principal assistant during the survey, has been 

 my son, E. Emmons, Jr. The drawings, particularly the fossils, were executed 

 by him upon wood ; and for their accuracy, they are entirely indebted to his skill 

 in delineation. I am particularly indebted to Mr. Patterson, of the State Print- 

 ing Office, for his unwearied exertions in superintending and correcting the sheets 

 as they were printed, and for important suggestions during the pi'ogress of the 

 work. To speak, however, of all who have aided me in the Survey, would 

 require more space than can be spared in this Preface. To my numerous friends 

 in the Northern District, I give my thanks generally for their attentions, and the 

 assistance which they were ever ready to bestow. 



EBENEZER EMMONS. 

 Albany, January 1, 1842. 



