48 GENERAL INDEX. 



Hancock Co., St. Louis limestone 1,84,333 



Keokuk limestone 1,89-102,334 



Geodes from the Keokuk limestone, a report by GEO. J. BBUSH,..I,90-% 

 Economical Goology, (building stone, hydraulic limestone, potter's 



clay, coal, agriculture) 1,338 



Statistics on vine and fruit in Hancock county, by N. W. BLISS.. 1, 341-349 



Hardin Co., (A. H. WOETHEN and H. ENGELMAN> ) 1,350-375 



Physical features 1,350 



Map of Hardin Co opp. 1,350 



Sections of strata 1,356 



Coal measures (millstone grit, conglomerate sandstone) 1,351,359 



Chester group 1,350 



St. Louis group (including the lead bearing strata)... 1, 87, 350, 353; 111,17-19 



Keokuk group 1,350,353 



Kinderhook group 1,352 



Black slate (Devonian) 1,352 



Keport on the Eosiclare Lead Mines, with 4 maps and plans, by 



Dr. J. G. NORWOOD 1,366-372 



Economical Geology, (coal, iron ores, galena, zinc blende, fluor spar, 



mineral springs, building material, agriculture) 1,362,372; 111,17-19 



Henderson Co., (H. A. GBEENE) .IV.276-287 



Physical features IV, 276 



Sections of Strata IV.279-285 



" Quarternary deposits IV, 277 



" Coal measures IV.278 



St. Louis group IV, 278 



Keokuk group IV.279 



Burlington group IV,281 



Kinderhook group IV.285 



" Economical Geology, (building stone, limestone for lime, coal, clay, 



zinc blende, agriculture) IV, 286 



Henry Co., (JAMES SHAW and A. H. WOETHEN) V, 185.201 



Physical features V.184 



Sections of strata V.187-199 



Quarternary deposits V.187 



Coal measures (lower) V.188; VII, 4 



' ' Devonian limestone (Hamilton) V.187 



' ' Niagara limestone (LeClair) V, 187 



Economical Geology, (coal, stone, clays, agriculture) V.200 



Iroquois Co., (see Kankakee and Iroquois counties.) 



Jackson Co., (A. H. WOETHEN and H. ENGELMANN) 111,58-83 



Physical features, (with four steel engravings from sketches of "The 

 Devil's Bake-Oven" and "Back-Bone" (Devonian), by PAULUS 



BOETTEB 111,58 



Sections of strata 111,61-73; VIII, 52 



Quarternary deposits 111,75 



Lower Coal measures 111,69; VIII, 53 



List of 66 localities of coal in the county 111,74 



Conglomerate 111,68 



Chester group 111,65 



St. Louis and Keokuk groups III. 64 



Hamil' on group 111,63 



Oriskany group 111,62 



Onondaga group 111,62 



