TABLE OF CONTENTS. 



INTRODUCTORY. BY W. S. BLATCHLEY. 



Report of Progress on Coal Survey 2 



Mine Inspector's Report 4 



Petroleum 4 



Report of State Supervisor of Natural Gas 6 



The Geology of Lake and Porter Counties 8 



The Clays and Clay Industries of Northwestern Indiana 9 



Utilization of Convict Labor in Making Road Material 11 



Report on the Niagara Limestone Quarries 14 



Catalogue of the Fossils of Indiana 14 



The Birds of Indiana 15 



GEOLOGICAL SCALE OF INDIANA. BY W. S. BLATCHLEY AND 

 GEORGE H. ASHLEY. . 



The Potsdam Sandstone 17 



The Lower Magnesian Limestone 17 



The St. Peter's Sandstone 17 



The Trenton and Galena Limestones 18 



The Utica Shale 18 



The Hudson River Limestones and Shales 18 



The Clinton Limestones 18 



The Niagara Limestone 19 



The Waterlime and Lower Helderberg 19 



The Corniferous 19 



The Hamilton 19 



The New Albany or Genesee Shale 19 



The Knobstone 20 



The Harrodsburgh Limestone 20 



The Oolitic Limestone 20 



The Mitchell Limestone 21 



The Chester or Kaskaskia 21 



The Mansfield Sandstone 21 



The Coal Measures 21 



The Merom Sandstone 22 



Triassic to Tertiary, Inclusive ., ; . . 22 



Recent and Glacial 23 



