'Two Joy 3-JCM and one Goodman 300 continuous miners are now in service producing coal. These machines have roof bolting machines as an integral part of their equipment. Two Joy 3-JCM machines are also being used brushing top and bottom where additional height is needed in the main haulage entries.'
Two miners work with a cutting machine at Mine 206, Kentucky. 'This material is the property of the Consolidation Coal Co. and must be returned promptly to: Advertising Department, Consolidation Coal Company, 30 Rockefeller Plaza, New York, N.Y.