196 Miscellanies. 



of wheat, and of other grasses. The report is concluded with 

 suggestions as to a future detailed survey, which, as they are 

 (like the entire report) marked by much good sense and correct 

 knowledge, ought to command, and we trust will secure, the at- 

 tention of the legislature and people of Indiana. 



Ohio. — First annual report on the Geological Survey of the 

 State of Ohio, by W. W, Mather, principal Geologist, and the 

 several assistants ; 134 pages with a map and sections. Columbia. 



The extent of this exploration and the diversity of objects 

 which it has embraced, will be best understood from the divisions 

 of the subject which we annex, made up from the contents and 

 index ; and the names of the gentlemen who acted as assistants, 

 will appear in connexion with the contents of their several reports. 



Prof. Mather^s Report. — General considerations. — Coal, quan- 

 tity, its practical value compared with Charcoal for furnaces, an- 

 nual prospective consumption of it, means of motive power inex- 

 haustible. — Iron Ore, extent. — Iron trade, reduction of iron ores. 

 Limestones, extent and uses, marbles, galena and fossils. — Sand- 

 stones, importance for public works, uses and export. — Clays, uses 

 for bricks, pottery, &c. — Peat, varieties and uses. — Soils, produc- 

 tiveness, texture, substrata, drainage, and composition. — Mineral 

 manures, limestone, gypsum, marls and lime. — Mineral springs, 

 salt springs, petroleum. — Alluvial action on the Muskingum and 

 Ohio, on the Lake coast, at Fairport, Chagrin, Cleveland, &;c. — 

 Analysis of coal and ores, coal for smelting, manufacture of coke 

 in Ohio, used in high furnaces. — Importances of determining the 

 dip. 



Dr. HildretJi's Report. — Introductory remarks, coal fields of 

 Great Britain, extent of coal in Ohio. — Rock strata above the buhr- 

 stone. — Buhr-stone, range and extent, value and importance, qual- 

 ity and character, French buhr compared with the Ohio buhr, 

 mineral contents of the calcareo-silicious rock, agricultural charac- 

 ter of the Buhr-stone region, iron ore with the buhr-stone, strata 

 between the buhr and upper fossiliferous limestone. — Upper fos- 

 siliferous limestone, range and extent. — Strata between the lime- 

 stone and Pomeroy coal beds. — Pomeroy coal beds, range and ex- 

 tent, fossils which accompany them, agricultural character of the 

 region. — Strata between the Pomeroy coal and limestone coal. — 

 Limestone coal, range and extent. — Limerock, non-fossiliferous, — 

 Stone marls, range and extent of lime and marls, agricultural char- 



