GENERAL INDEX. 53 



Morgan Co.. (HENBY M. BAXXISTEB) IV, 149-162 



Physical features V, 149 



Sections of strata IV.150-1GO; YII,32; VHI,50.66 



Quaternary deposits IT, 150 



Coal measures IY.151; Vn,32; VI 11,50 



St. Louis limestone IV.ltiO 



Economical Geology, (coal, clays, building material) IV, 161 



Artesian wells Vin, 66 



iloultrie. Macon and Piatt Counties, (G. C. BBOADHEAD) VI, i 5-1% 



Physical features VI, 185, 189, 194 



Sections of strata VI.186-195; Vn,17: VIII. 15,48 



Quaternary deposits VI, 186, 190, 195; VIII, 15 



Coal measures VI,187,193; VII. 17; VIH.48 



Agriculture and water VI, 188, 192, 196 



Ogle Co., UAMES SHAW) V.104-123 



Physical features V, 104 



Sections of strata V, 107 



Quaternary deposits V.107, V ill, 10 



Cincinnati group V, 110 



Galena limestone V.lll 



Blue limestone V.113 



Buff limestone , V.115 



St. Peter sandstone V, 115 



Lower Magnesian limestone V.118 



Economical Geology, (stone, peat, clays and sand, agriculture) V.119 



Peoria Co., (A. H. WOBTHEN) V.235-252 



Physical features V.235 



Sections of strata 1,53,230; V.236-245 



Quarternary deposits V.235 



Coal measures 1,52.229; V.238; VH.6 



Economical Geology, (coal, building stone, iron ore, cla>s, sand, 



gravel, agriculture) V.247 



Analyses of coal V.248 



Perry Co.. (A. H. WOBTHEN and E. EXGELMAXS) 111,84-103 



Physical features 111,84 



Sections of strata 111,86-96; Vm,56 



Quarternary deposits m,86 



Coal measures 1,220; D3.87; VHI.56 



Economical Geology, (coal, iron ores, building stone, sand, clay, ag- 

 riculture) 111,97 



Analyses of coal 111,98 



Salt wells VH.38 



Piatt Co. See Moultrie, Macon and Piatt counties. 



Pike Co., (A. H. WOBTHEN) IV, -24-42 



Physical features IV, 24 



Sections of strata IV, 26,27 



Quarternary deposits IV, &5 



Coal measures IV, 32 



St. Louis limestone IV, 32 



Keokuk group IV.31 



Burlington limestone IV.29 



Kinderhook group I V , :.>; 



Niagara limestone I V,2<j 



Economical Geology, (building stone, coal, iron ore, lime, hydraulic 

 limestone, clay and sand, marble, mineral springs, soil and timber) JV.37 



