CONTENTS. 



I' AGE. 



1. Title, 1 



2. Contents, 5 



3. Report of the State Geologist 7 



4. The Stratigraphic and Faunal Relations of the Oneonta Sandstones and Shales, the Ithaca 



and Portage Groups in Central New York; by John M. Clarke, 27 



5. The Classification and Distribution of the Hamilton and Chemung Series of Central and 



Eastern New York, Part I ; by Charles S. Prosser, ....... 83 



6. The Stratigraphic Position of the Portage Sandstones in the Naples valley and the Adjoin- 



ing Region ; by D. Dana Luther, 223 



7. The Economic Geology of Onondaga county, New York ; by D. Dana Luther, . . . 237 



8. The Structural and Economic Geology of Erie county ; by Irving P. Bishop, . . . 305 



9. Geology of Orange county ; by Heinrich Riks, 393 



10. Report on the Crystalline Rocks of St. Lawrence county ; by Charles H. Smyth, Jr., . 477 



11. Report on the Geology of Cliuton county ; by Henry P. Cushing, 499 



12. Preliminary Report on the Geology of Essex county ; by James F.Kemp, .... 575 



13. Sections and Thickness of the Lower Silurian Formations on West Canada creek and in 



the Mohawk valley ; by Charles S. Prosser and Edgar R. Cumings, . . . (il5 



14. Report on the Talc Industry of St. Lawrence county ; by Charles H. Smyth, Jr., . . 661 



15. Physical Tests of the Devonian Shales of New York State to Determine their Value for 



the Manufacture of Clay Products ; by Heinrich Riks, 673 



16. The Discovery of a Sessile Conularia ; by R. Ruedeman.v 699 



17. Notes on Some Crustaceans from the Chemung Group of New York; by John M. Clarke, 729 



5 



