548 PROCEEDINGS OF THE WASHINGTON MEETING 



The coal seams of the Lower Coal Measures of Ohio. The Hocking Valley coal 

 field. Ibid., pp. 912-991, 1 map. 



The coal seams of the Lower Coal Measures of Ohio. Mines of Vinton and Jack- 

 son counties. Ibid., pp. 993-1034, 1 map. 



The coal seams of the Lower Coal Measures of Ohio. Mines of Scioto and Law- 

 rence counties, and of the western part of Gallia county. Ibid., pp. 1035-1058, 

 1 map. 



[Quarries and quarry regions of] Ohio. (Compiled mainly from notes of Professor 

 Orton.) [Tenth Census of the United States, vol. x.] Building stones of the 

 United States, pp. 188-215. [Text same as in " Building stones of Ohio," 

 supra.'] 1884. 



[Quarries and quarry regions of] Indiana. (Compiled mainly from notes of Pro- 

 fessor Orton.) Ibid., pp. 215-219. 



Salt and bromine production in Ohio. Ohio Min. Jour., 1885, vol. iii, pp. 7-14. 



The horizons of petroleum and inflammable gas in Ohio. [Abstract.] Proc. Am. 

 Assoc. Adv. ScL, 33d meeting, 1884, pp. 397-398. 1885. 



The correlation of the Lower Coal Measures of Ohio and eastern Kentucky. 

 [Abstract,] Ibid., pp. 398-399. 



Natural gas in Ohio. Amer. Manufacturer ; Natural gas supply, April 30, 1886, p. 15. 

 Reprinted in U. S. Geol. Survey, Min. Resources for 1887, pp. 479-484. 1888. 



Present production of petroleum and natural gas in Ohio. [Extracts from ad- 

 vance sheets of Report on Petroleum and Inflammable Gas.] Amer. Manu- 

 facturer, August 6, p. 13, and August 20, p. 13, 1886. 



[A year's progress in geology.] Address [of vice-president American Association 

 for the Advancement of Science.] Proc. Am. Assoc. Adv. Sci., 34th meeting, 

 1885, pp. 173-197, 188(5. 



The recently discovered sources of natural gas and petroleum in northwestern Ohio. 

 [Abstract.] Ibid., pp. 202-204. 



The record of the deep well of the Cleveland Rolling Mill Company, Cleveland, 

 Ohio. [Abstract] Ibid., pp. 220-222. 



Characteristics of Ohio coals. [Tenth Census of the United States, vol. xv.] Report 

 on mining industries (exclusive of precious metals), 1886, pp. 619-622. 



Petroleum and natural gas as found in Ohio. Science, vol. vii, 1886, pp. 560-564, 

 1 map. 



Preliminary report upon petroleum and inflammable gas. Geol. Survey Ohio, 1886, 

 76 -f iii pp., 2 maps. 



The Findlay field, continued. Article 4. Amer. Manufacturer, May 27, 1887, p. 13. 



Geological Survey of Ohio. Preliminary report upon petroleum and inflammable 

 gas. Reprinted for the author with a supplement. 200 pp., 1 pi., 2 maps. 

 Columbus, 1887. 



The Trenton rock and gas supply. Ohio Min. Jour., vol. v, 1887, pp. 85-89. 



The conditions of oil and gas production in northern Ohio and Indiana. Ohio 

 Min. Jour., 1888, vol. vi, pp. 29-33. 



The geology of Ohio, considered in its relations to petroleum and natural gas. 

 Geol. Survey Ohio, vol. vi, Economic geology, 1888, pp. 1-59, 2 pi., 1 map. 



The origin and accumulation of petroleum and natural gas. Ibid., pp. 60-100, 



1 map. 



The Trenton limestone as a source of oil and gas in Ohio. Ibid., pp. 101-310, 2 pi., 



2 maps. 



