Add to ORKGColmol mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Rochester and Pittsburgh Coal Company, Indiana, Pennsylvania, 1950. The Colmol could cut and move up to 80 tons of coal per day
This photograph shows the discharge end of a 34-B coal cutting and loading machine built by the Jeff...
1908 catalog cover for the Jeffrey Manufacturing Company of Columbus, Ohio, showing a coal tipple wi...
The Jeffrey Manufacturing Company built this 120-L Heliminer coal cutter and conveyor. This machine ...
Colmol mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio inside the factory...
Example of patterns cut on the wall of a coal mine by a Colmol mining machine, 1950. This machine co...
Heliminer mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio at work in a co...
44-D coal loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the ...
Heliminer mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio inside the fact...
Coal cutting and loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use ...
Two miners using a coal loading machine at the Arkwright Coal Company mine, Morgantown, West Virgini...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio on display i...
Laborer operating a piece of Jeffrey mining equipment loaded with barrels. The Jeffrey Manufacturing...
This photograph depicts a 209-B portable loader produced by the Jeffrey Manufacturing Company of Col...
This drilling machine was made by the Jeffrey Manufacturing Company of Columbus, Ohio. This mining m...
Jeffrey L 400 Coal Loading Machine on exhibit at the American Mining Congress in Cincinnati, Ohio, 1...
This photograph shows the discharge end of a 34-B coal cutting and loading machine built by the Jeff...
1908 catalog cover for the Jeffrey Manufacturing Company of Columbus, Ohio, showing a coal tipple wi...
The Jeffrey Manufacturing Company built this 120-L Heliminer coal cutter and conveyor. This machine ...
Colmol mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio inside the factory...
Example of patterns cut on the wall of a coal mine by a Colmol mining machine, 1950. This machine co...
Heliminer mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio at work in a co...
44-D coal loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the ...
Heliminer mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio inside the fact...
Coal cutting and loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use ...
Two miners using a coal loading machine at the Arkwright Coal Company mine, Morgantown, West Virgini...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio on display i...
Laborer operating a piece of Jeffrey mining equipment loaded with barrels. The Jeffrey Manufacturing...
This photograph depicts a 209-B portable loader produced by the Jeffrey Manufacturing Company of Col...
This drilling machine was made by the Jeffrey Manufacturing Company of Columbus, Ohio. This mining m...
Jeffrey L 400 Coal Loading Machine on exhibit at the American Mining Congress in Cincinnati, Ohio, 1...
This photograph shows the discharge end of a 34-B coal cutting and loading machine built by the Jeff...
1908 catalog cover for the Jeffrey Manufacturing Company of Columbus, Ohio, showing a coal tipple wi...
The Jeffrey Manufacturing Company built this 120-L Heliminer coal cutter and conveyor. This machine ...