169 



Annual production of, p. 265. 



Mines, classification of, p. 262. 



Annual production of, 1887, p. 243. 



Gas coals, comparison with Pittsburg coals, p. 242. 



Mines and wages, p. 242. 



Statistics on production, consumption of, Min. Res. U. S. 1888. 



Statistics on production of, 10th census U. S. 1880. 



The following are reported upon : Clay, Daviess, Dubois, Fountain, Gib- 

 son, Greene, Harrison, Knox, Martin, Owen, Park, Perry, Pike, 

 Spencer, Sullivan, Vanderburg, Vermillion, Vigo, Warren, Warrick. 



Indiana coal fields. Clay, Dubois, Perry, Pike, Posey, Spencer, Vander- 

 burg and Warrick counties. (See Lesquereux.) 

 Thompson's Rep. 1888. 

 Cannelton. (See Lesley.) 

 Ooke. Character of Ind. coking coals, 10th census U. S. mining indus- 

 tries, 1880, p. 48. 



History of the coking industry, 10th census U. S. 1880, p. 27-28. 

 Gas. Collett, J., Rep. 1882. Observations on Gas in Indiana. 



Collett, J., Rep. 188.3. Observations on Gas in Indiana. Article on com- 

 parison of Indiana block with Illinois coals. 



Thompson, M., Rep. 1885-86. Natural Gas. What is it? 



Thompson, M., Rep. 1888. Natural Gas and Petroleum. 



Gorby, S. S., Rep. 1890. (See Jordan, E. J. S.) Gas in Grant, Howard, 

 Tipton, Hamilton, Madison, Hancock, Delaware, Blackford, Henry 

 and Rush counties. 



Gas field of Indiana. (See Leveritt.) 



Natural Gas field of Indiana. Eleventh Ann. Rep. of Director of U. S. G. S. 

 (See Phinney) pp. 617-742. 



Rock Gas and Related Bitumens. Eleventh Ann. Rep. of Director of 

 U. S. G. S. (See Magee, W. T.) 



Natural Gas in Indiana. Min. Resources of U. S. 1886, p. 508 ; do 1887, 

 pp. 485, 488, 489 ; do 1888, p. 486. 



Orton, Edward. Origin of the Rock Pressure of the Natural Gases of 

 the Trenton lime stone of Ohio and Indiana. A. J. S. Ill, vol. 29, 

 p. 225. 

 Gold in Indiana. (See Sutton.) 



Gold in Indiana. (See Cox's Geol. Rep. 1878, p. 116, Morgan and Brown 

 counties.) 



