INDEX. 699 



Pagk. 



Earth works, Ancient, in Lorain county 223 



Erie clay 21 



" Mode of formation of 28 



Erie county, Geology of 183 



Economical Geology of 195 



Erie shale :...188, 213, 242 



Fairfield county, Geology of 592 



Forest bed of the Drift 6, 30,447, 589 



Gas springs 221 



Glacial grooves, Direction of 9 



Kelley's Island 201 



" period, Causes of 65 



Glaciers, Motion of 69, 449 



Gold in Drift beds 70 



Greene county, Geology of 659 



Greenfield limestone 615 



Guelph limestone 676 



Guernsey county, Geology of 528 



Hamilton Group 189, 289, 338, 427 



Hancock county, Geology of 358 



Hardin county, Geology of 352 



Henry county, Geology oi 415 



"Horsebacks" 174 



Huron shale 5, 90, 188, 213, 243, 282, 616, 646 



" Fossils of 214, 647 



Islands of Lake Erie, Geology of 197 



Iron furnaces, Paulding county 350 



Iron ores, Analyses of — 



Blackband, Guernsey county 530 



Dutton ore 489 



Enoch's ore 525 



Gorby's ore 515 



con 



Monroe county 



Klfi 



Teeters'sore oxo 



Washington county 



Kelley's Island 



4 

 Lacustrine Drift 



Lake ridges, Origin of " 



" Lorain county 



Lakes, Origin of 



Lime, Manufacture of— 



Crawford county 



Delaware county 



