GEOLOGICAL WRITINGS OF C. A. ASHBURXER. 565 



The Township Geolog)^ of Elk and Forest Counties : Report BR, 1885, pp. 61-320. 



Geological Atlas of Elk, Cameron and Forest Counties : Atlas^ RR, 1885. 



Drillings for Coal in Sergeant Township, McKean County: A correspondence by 



N. F. Jones, J. P. Lesley, and C. A. Ashburner: Report RR, 1885, pp. 327-363. 

 Notes on Iron Ores in Cameron County : Report RR, 1885, pp. 363-369. 

 Boring for Oil in Potter County, with geological conclusions based on the same: 



Annual Report 1885, 1886, pp. 82-91. 

 Report on the Topton Run Coal Openings, Blair County : Annual Report 1885, pp. 



251-265. 

 Second Report of Progress in the Anthracite Coal Regions : Part 2, Annual Report 



1885, pp. 269-437. 

 Report on the Wyoming Valley Limestone Beds : Annual Report 1885, pp. 437-460. 

 Report on the Bernice Coal Basin, in the Loyalsock and Mehoopany Coal Fields 



in Sullivan County : Annual Report 1885, pp. 460-486. 

 Report on the Brandywine Summit Kaolin Bed, Delaware County : Annual Report 



1885, pp. 593-611. 

 Description of the Archbald Pot-holes; also of the Buried Valley of Newport 



Creek, near Nanticoke, with special reference to the " Nanticoke Mine Dis- 



p,ster" of December, 1885: Annual Report 1885, pp. 615-637. 



Published in Transactions American Institute Mining Engineers 



The Bradfu'd Oil District of Pennsylvania : vol. vii, 1879, p. 316. 



Brazos Coal-field in Texas: vol. ix, 1881, p. 495. 



New Method of Mapping the Anthracite Coal-fields of Pennsylvania : vol. ix, 1881, 

 p. 50(). 



The Flannerj' Boiler-setting for the Prevention of Smoke: vol. x, 1881, p. 212. 



The Anthracite Coal-beds of Pennsylvania: vol. xi, 1882, p. 136. 



The Product and Exhaustion of the Oil Regions of Pennsylvania and New York : 

 vol. xiv, 1885, p. 419. 



The Geology of Natural Gas: vol. xiv, 1885, p. 428. 



The Classification and Constitution of Pennsylvania Anthracites: vol. xiv, 1886, 

 p. 706. 



The Geological Distribution of Natural Gas in the United States: vol. xv, 1886, 

 p. 505. 



The Geological Relations of the Nanticoke Disaster: vol. xv, 1887, p. 629. 



Coal Production in Utah: vol. xvi, 1887, \). 356. 



Petroleum and Natural Gas in New York State: vol. xvi, 188S, p. 906. 



The Development and Statistics of the Alabama Coal-fields for 1887 : vol. xvii, 

 1888, p. 206. 



Natural Gas Explorations in the Eastern Ontario Peninsula: vol. xvii, 1888, p. 290. 



The Geology of Buffalo as related to Natural Gas Exploration along the Niagara 

 River: vol. xvii, 1888, p. 398. 



The Coal Trade and Miners' AVages in the United States for the Year 1888: vol. 

 xviii, 1889, p. 122. 



Description of the Discovery of Vespertine Coal-beds, Huntingdon County, Penn- 

 sylvania, read at Cleveland meeting, October, 1875. Not published in Transac- 

 tions. 



Section of the Paleozoic Strata of Huntingdon County, Pennsylvania, read at 

 Pliiladelphia meeting, June, 1876. Not published in Transactions. 



LX XIX— Bull. Geol. Soc. Am., Vol. 5, 1893. 



