GENERAL INDEX. 45 



Bureau Co..(Cincinna?i and Trenton) V.181 



Economical Geology, (coal, building stone, clays, sand, peat, agricul- 

 ture) V.182 



Calhoun Co., (A. H. WOBTHEN IV.1-23 



Physical features IV.l 



Fault at Cap au Gres -. IY.2t 



'Sections of strata 1,111 IV,3,4,13,16 



St. Peter sandstone IV H 



Trenton group FV,4 



Cincinnati group IV.5 



Niagara limestone IV,6 



Hamilton limestone IV.8 



Kinderhook group IV. 9 



Burlington limestone IV,12 



Keokuk limestone IV, 14 



St. Louis group IY.15 



Coal Measures IV, 15,21 



Quaternary system, drift, loess IV.17 



Economical Geology, (building stone, limestone for lime, glass sand, 



iron ore, mineral springs, agriculture and soil) IV.18 



Carroll Co., (JAMES SHAW) V.75-81 



Physical features V,75 



Galena limestone 1,142 ; V, 76 



Cincinnati group V,77 



Niagara C'Pentamerus beds") V,78 



Quaternary system V.79; VHI.IO 



Cass and Menard Counties, (H. M. BANNISTEB) IT, 1' 3-175 



Physical features IV.163 



Sections of strata IV,164-173; VH.14- 2: Vin,16,61 



Quaternary IV, 164 ; VTTT, 8, 16 



Coal measures IV.165; VII.42 



Economical Geology, (coal, iron ore, building stone, other building 

 materials) IV, 173; VII, 14 



Champaign, Edgar and Ford Counties (FBANK H. BBADLEY) IT, 266-275 



Section of strata IV, 276, 270, 272; VHI,17,27 



Quaternary deposits IV, 266, 272, 273: VUUL, 12,28 



Coal measures IV, 267, 271 ; VIII, 26 



Ancient channel from Lake Michigan IY.273 ; VLU, 12 



Christian Co., (G. C. BBOADHEAD) YI.156-162 



General features, soil, timber, crops, etc VI, 156 



Sections of strata VI.128, ; 59-161; VEI,22; Vm,15,16 



Quaternary VI, 158 



Coal measures VI, 159 



Economical geology, (coal, building material) VI, 162 



Clark Co., (A. H. WOBTHEN) VI.9-21 



Sections VI.10-19 



Quaternary deposits VI, 10 



Coal measures VI, 10 



Economical geology, (coal, building stone, lime, potter's clay, soil 

 timber) VI, 20 



Clay Co. See "Wayne and Clay counties. 



Clinton Co., (H. ENGELMAX) 111,172-191 



Physical feature - Ill, 172 



