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.
By: by J.D. Davis, D.A. Reynolds, W.H.Ode ... [and others].
Contributors: Reynolds, Dewey A., 1898- joint author.; Ode, W. H. 1905- joint author.
Series: U.S. Bureau of mines. Technical paper 672.
Publisher: U.S. Govt. print. off.
Published: 1945
Place of publication: Washington
Language: eng
Number of pages: 46
Subjects: Coal -- Kentucky -- Perry County; Coal -- Testing; Carbonization
Other titles: Carbonizing properties and petrographic composition of coal.
Notes: At head of title: United States Dept. of the interior, Harold L.  Ickes, secretary. Bureau of mines, R.R. Sayers, director.
"Publications on the survey of carbonizing properties of American coals": p.44-46.