Coal Co.; Mercer Gas Coal Co.; Miners Block Coal Co.; 
Miners Co-Operative Coal Co.; Monessen Coal & Coke 
Co.; Montour & Lake Erie Coal Co.; Naomi Coal Co.; 
National Mining Co.; North Penn Coal Co.; Ohio River 
Coal Co.; Peoples Coal Co.; Pen-American Gas Coal Co.; 
Penn-Franklin Coal Co.; Penn-Pitt Coal & Coke Co.; 
Penn Smokeless Coal Co.; Penn York Coal & Coke Co.; 
Peters Creek Coal Co.; Pioneer Coal & Coke Co.; Pitt 
Gas Coal Co.; Pittsburgh Block Coal Co.; Pittsburgh- 
Cambridge Coal Co.; Pittsburgh-Connellsville Coal & 
Coke Co.; Pittsburgh, Great Lakes & Northwestern Coal 
Corporation; Pittsburgh Hanover Coal Co.; Pittsburgh 
Pocahontas High Grade Coal Co.; Pittsburgh Seam Coal 
Co.; Pittsburgh & Baltimore Coal Co.; Pittsburgh & 
Bessemer Coal Co.; Pittsburgh & Erie Coal Co.; Pluto 
Coal Co.; Producers Coal Corporation; Producers Fuel 
Co.; Poland Coal Co.; Quality Coal & Coke Co.; W. J. 
Rainey, Coal & Coke; Raridan & East Brady Coal Co.; 
Redbank Coal Co.; Reilly-Peabody Fuel Co.; Reliance 
Coal & Coke Co.; Richards Coal Mining Co.; Richland 
Coal Co.; Robbins Coal Co.; Sagamore Coal Co.; Saw 
Mill Run Coal Co.; Second Pool Coal Co.; Short Creek 
Coal Co.; W. B. Skelly Coal Co.; South Fayette Coal 
Co.; Spring Valley Coal Co.; Springer Coal Co.; Squirrel 
Hill Coal Co.; Standard Coal Sales Co.; Star Fuel Coal 
Co.; Superba Coal & Coke Co.; Tasa Coal Co.; Taylor 
Run Coal Co.; Tri-State Coal & Coke Co.; Two Rivers 
Cannel Coal Co.; Union Coal & Coke Co.; Union Col- 
lieries Co.; Union Fuel Co.; United Fuel & Iron Co.; 
United States Coal & Coke Co.; Valley Camp Coal Co.; 
Vesta Coal Co.; Victoria Coal Co.; Victory Coal Co.. 
Vulcan Coal Co.; Walter-Wallingford Coal Co.; W. H; 
Warner & Co.; Warner Youghiogheny Coal Co.; Wash- 
ington Gas Coal Co.; Waverly Coal & Coke Co.; Wayne 
Coal Co.; Weaver Coal Co., Inc.; West Penn By-Product 
Coal Co.; West Penn Fuel Co.; Westmoreland-Connells- 
ville Coal & Coke Co.; Westmoreland Fuel Co.; Wilson- 
Beegle Coal Co.; Winfield Coal Co.; Woodruff Coal & 
Iron Co.; Youghahela Coal Co.; Youghiogheny Coal & 
Coke Co.; Youghiogheny Pittsburgh Coal Co.; Yough- 
Leherv & Ohio Coal Co.; Zenith Coal Co.