TABLE OF CONTENTS. XITI 
PAGE 
CHAPTER IX. The Clays of Ohio, and the Industries Established upon 
AGING AB Joely arel MO, 1h? c65560000800086080N00950 nosonbwB8BOAL 643- 721 
The Origin, Composition, Analysis, and Properties of Clay, 646; Clay De- 
posits of Ohio, 656; Clay Working Industries of Ohio, 668 ; Pottery, 
668; Refractory Material, 686; Building Material, 703; Pipe-making, 
HOORMOrmarie mbaleaWio nkes eres eae tees eucaes sce cciscce ase Sense Uvatees veverse bie rout 717 
CHAPTER X. The Gas Coals of Ohio—By Emerson McMillin, Sup’t of Colum- 
DUSHG ASPIORKSieecrensancsrionsenscedtnsescwoascseedeccscsace snes soueecesces 722— '749 
CHAPTER XI. The Glacial Boundary in Ohio—By Professor G. Frederick 
WET DI Neen ee Meets Ae Res dais case caicstslcheisvededcaesescedtes 750— 7°72 
Proofs of Glaciation, 750; Special Account of Glacial Margin, 759; List of 
Places where Streams Emerge from the Glaciated Region, 761; The 
Unglaciated Area, 766; Direction of Glacial Striae ......... 0 2... sce eee ee ee 770 
CHAPTER XII. The Coal Seams of the Lower Coal Measures of Ohio (Con- 
tinued). The Massillon Coal Field.—By Edward Orton..773- 815 
Structure of the Massillon Coal Field, 775; Character of the Massillon 
Coal, 777; Uses of the Massillon Coal, 779; Mines of the Massillon Coal 
ie de Osa Main esyb yao war slnipRecesaces loses cee dn onesecoedalmaentevaneteculvccs .796— 815 
CHAPTER XIII. The Coal Seams of the Lower Coal Measures of Ohio (Con- 
tinued). The Coal Mines of Holmes Co.—By Albert A. 
ANTI ES acc ee Oa pate Mena a 816- 842 
Stratigraphical Order, 817; Coal Seams and Mines.....................cse ceseeeees 821 
CHAPTER XIV. The Coal Seams of the Lower Coal Measures of Ohio (Con- 
tinued). Mines of Coshocton County.—By Edward 
CHAPTER XV. The Coal Seams of the Lower Coal Measures of Ohio (Con- 
tinued). Mines of Muskingum, Licking, and the Northern 
Half of Perry Counties —By Edward Orton ................. 868- 911 
Mines of Muskingum Co., 868; Mines of Perry Cv., Northern and Central 
MOwnshipsyssaswMiimecroOtelalc kimon© Oyassncseccfcscsssseesccceeneerteenstetecctes 908 
CHAPTER XVI. The Coal Seams of the Lower Coal Measures of Ohio (Con- 
tinued). The Hocking Valley Coal Field.—By Edward 
Orbos en cene sees ae ac a octates Sate Cee ate aan e tenon dae taut 912- 991 
The Sunday Creek Valley, 926; The Shawnee and Straitsville District, 
O44 a Ther Mond aye Creek WDistricti.cacccnsecs tte cscs Ueowccceseceeececeteteedcecetoose 958 
CHAPTER XVII. The Coal Seams of the Lower Coal Measures of Ohio (Con- 
tinued). Mines of Vinton and Jackson Counties. —By 
Echwarde Onto me meester cy tease ccseccncsa.cearosloconcese cates 992-1034 
Section 1. Mines of Vinton Co., 995; Section 2, The Jackson Shaft, and 
Wellston Coal Fields, by Andrew Roy, 1011; Section 3, Mineg of Jack- 
Sonu omraboveriorizonvolVellstonyCoallmcessciccssccceseettencencesees cece ons 1024 
CHAPTER XVIII. The Coal Seams of the Lower Coal Measures of Ohio 
(Continued). Mines of Scioto and Lawrence Counties, 
and of the Western Part of Gallia County.—By Edward 
OrtOMe renee see neces eres cote e cons os tee haa viveloe baud Soon yess 1035-1058 
CHAPTER XIX. The Meigs Creek Coal Seam in Nora Muskingum, Guern- 
sey and Noble Counties.—By C. Newton Brown...... 1059-1087 
CHAPTER XX. Report of the Chemical Department.—By N. W, Lord......... 1087 
Analysis of Coals, 1088; Sulphur in Coals, 1089; Analysis of Iron Ores, 
1091; of Limestones, 1093; of Pig-irons, 1094; of Fire-clays, 1096; 
Tables of Analyses....... ..0... sessees SO SOLOOUOO RCE E USO ERO NER ISBT RE BOEEDAnEF eee 1099° 
