This photograph shows the discharge end of a 34-B coal cutting and loading machine built by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Valier Coal Company, Valier, Illinois, 1918. A single cut with the 34-B took about 20 minutes and yielded over 8 tons of coal
41-A coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the Jeffr...
The Jeffrey Manufacturing Company built this 120-L Heliminer coal cutter and conveyor. This machine ...
This photograph depicts a 209-B portable loader produced by the Jeffrey Manufacturing Company of Col...
Coal cutting and loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use ...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio on display i...
44-D coal loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the ...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at th...
38-A coal loader made by the Jeffrey Manufacturing Company of Columbus, Ohio pictured in the factory...
A 34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio was used t...
This coal-mining machine, called a 34B entry driver, was made by the Jeffrey Manufacturing Company o...
Coal car unloading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio, 1921. The un...
Shortwall coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Fran...
Sectional loader made by the Jeffrey Manufacturing Company of Columbus, Ohio. Sectional loaders were...
Sectional loader made by the Jeffrey Manufacturing Company of Columbus, Ohio. Sectional loaders were...
Two miners using a coal loading machine at the Arkwright Coal Company mine, Morgantown, West Virgini...
41-A coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the Jeffr...
The Jeffrey Manufacturing Company built this 120-L Heliminer coal cutter and conveyor. This machine ...
This photograph depicts a 209-B portable loader produced by the Jeffrey Manufacturing Company of Col...
Coal cutting and loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use ...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio on display i...
44-D coal loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the ...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at th...
38-A coal loader made by the Jeffrey Manufacturing Company of Columbus, Ohio pictured in the factory...
A 34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio was used t...
This coal-mining machine, called a 34B entry driver, was made by the Jeffrey Manufacturing Company o...
Coal car unloading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio, 1921. The un...
Shortwall coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Fran...
Sectional loader made by the Jeffrey Manufacturing Company of Columbus, Ohio. Sectional loaders were...
Sectional loader made by the Jeffrey Manufacturing Company of Columbus, Ohio. Sectional loaders were...
Two miners using a coal loading machine at the Arkwright Coal Company mine, Morgantown, West Virgini...
41-A coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the Jeffr...
The Jeffrey Manufacturing Company built this 120-L Heliminer coal cutter and conveyor. This machine ...
This photograph depicts a 209-B portable loader produced by the Jeffrey Manufacturing Company of Col...