Carbonizing properties and petrographic composition of Hazard no. 4 coal from Columbus no. 4 mine and high-temperature carbonizing properties of Hazard no. 7 coal from Hardburly mine, Perry county, Ky.

Additional Authors:	Ode, W. H., Wilson, J. E., Davis, Joseph Dana,, Reynolds, Dewey A.,, Holmes, C. R., Elder, J. L.
Year:	1945
Document Type:	USBM
Issuing Agency:	U.S. Govt. Print. Off., Bureau of Mines,
SUDOC:	I 28.7:672
Series:	Technical paper / Bureau of Mines ;
Report Number:	672
Subjects:	Coal--Testing
	Carbonization
	Coal--Kentucky--Perry County
Link:	https://hdl.handle.net/2027/mdp.39015078486191