CONTENTS. 



PART I— ECONOMIC. 



CHAPTER I. Geological Scale and Geological Structure of Ohio. 



By Prof. Edward Orton Pages 3-44 



CHAPTER II. The Clays of Ohio, their Origin, Composition and Varieties. 



By Prof. Edward Orton Pages 45-68 



CHAPTER III. The Clay Working Industries of Ohio. 



By Edward Orton, Jr., E. M Pages 69-254 



CHAPTER IV. The Coal Fields of Ohio. 



By Prof. Edward Orton Pages 255-290 



PART II— GENERAL. 



CHAPTER I. The Archeology of Ohio. 



Gerard Fowke Pages 3-55 



CHAPTER II. The Botany of Ohio. 



Prof. W. A. Kellerman and W. C. Werner Pages 56-406 



CHAPTER III. Contributions to the Paleontology of Ohio. 



Prof. R. T. Whitfield... Pages 407-494 



CHAPTER IV. Observations on the so-called Waverly Group of Ohio. 



Prof. C. L. Herrick Pages 495-515 



CHAPTER V. Fossils of the Clinton Group in Ohio and Indiana. 



Aug. F. Foerste, Ph. D Pages 516-601 



CHAPTER VI. The Fossil Fishes of Ohio. 



Profs. E. W. Claypole and A. A. Wright Pages 602-02(5 



CHAPTER VII. New and Little Known. Lamellibranchiata from the 

 Lower Silurian Rocks of Ohio and Adjacent States. 

 E. O. Ulrich Pages 627-693 



