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Kohle
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keywords:(Kohle)
Consumption of coal, as affected by enginemen
Consumption of coal, as affected by enginemen
The carriage of coal on railways and canals
The application of traveling belts to the shipment of coal
Some notes on the bord-and-pillar system of work
Gobbin quarry and railway at the Saint-Etienne collieries
Further economics of coal and ore handling
Shipping coal by the aerial wire rope system at Port Morien, Cape Breton
Shipping coal by the aerial wire-rope system at Port Morien, Cape Breton
The coal fields and seaports of the United States
Coal shipping plant at Hoboken, D., L. and W. R. R.
Electrically operated temperley transporters
Some applications of electric power in Belgium
Some applications of electric power in Belgium