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PRE L IMINA RIE S 



Frontispiece, Plate I, Chemung Narrows ;t\pe section of the 



Chemung group. 

 Preface. 

 Contents. 



Collector's Outfit, Plate II. 

 Explanation of Plate II. 



PART I 



INTRODUCTION TO THE STUDY OF THE UPPER 

 DEVONIAN OF NEW YORK STATE. 



Occurrence of Rocks. 



Where 7*ocks arc seen. 



Rocks everywhere; a hard lesso?i. 



Kinds of Rocks in Southern New York: 

 Shale. 

 Sandstone. 



Calcareous layers, or limestone. 

 Conglomerate, 

 Explanation of 'compound terms , like arenaceous shale, etc. 



Definition and Explanation of a Few Important Geo- 

 logical Terms, (Illustrated by PL III and Fig's, i and 2. 



JrOSSILS. 



What they are. 



How they came to be in the Devonian rocks of Southern 

 New York. (Illustrated by Fig's. 3 and 4.) 



