Coal Paleobotany

Microscopic and Petrographic Studies of Certain American Coals

Origin and Petrographic Composition of the Lower Sunnyside Coal of Utah

Microscopic Study of Elkhorn Coal Bed at Jenkins, Letcher County, Ky

Splint Coals of the Appalachian Region: Their Occurrence, Petrography, and Comparison of Chemical and Physical Properties with Associated Bright Coals

Carbonizing Properties and Petrographic Composition of Lower Banner-bed Coal from Keen Mountain Mine, Buchanan County, Va: And the Effect of Blending this Coal with Pittsburgh-bed (Warden Mine) Coal

Carbonizing Properties and Petrographic Composition of Pocahontas No. 3-bed Coal from Buckeye No. 3 Mine, Wyoming County, W. Va., and of Pocahontas No. 4-bed Coal from No. 4 Mine, Raleigh County, W. Va

Carbonizing Properties and Petrographic Composition of Pittsburgh Bed Coal from Pittsburgh Terminal No. 9 Mine, Washington County, Pa

Carbonizing Properties and Petrographic Composition of Sewell Bed Coal from Wyoming Mine, Wyoming County, W. Va., and the Effect of Blending this Coal with Alma Bed Coal: Part 1

Carbonizing Properties and Petrographic Composition of Upper Freeport Coal from Morgantown District, Monongalia County, W. Va: And of Lower Freeport Coal from Eastern Indiana County, Near Cambria County, Pa

Carbonizing Properties and Constitution of Alma Bed Coal from Spruce River No. 4 Mine, Boone County, W. Va

Official Changes in the Active List of Permissible Explosives and Blasting Devices for August, 1930: 1930-1931