Two miners operate a cutting machine. 'Credit must be given to Willaim Vandivert, 21 East Tenth St., New York 3, N.Y., Not to be reproduced without written liscense.'
'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.'