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'Machine, helper and crew. 350 tons a day, per 8 hour shift.'

3049. Continuous Mining Machine, Helper and Crew

Two dogs harnessed to coal carts. About 1890, Ohio Coal Mine. This photograph is the property of Pittsburgh Consolidation Coal Co.

3050. Dogs in Harness, Ohio Coal Mine

3051. Miners Operating a Cutting Machine

Miner drilling a hole for explosives at the Bishop Mine, Pocahontas Fuel Co.

3052. Drilling Prior to Placing Explosives at Bishop Mine, Pocahontas Fuel Company

Miners drill two or more holes into coal to place the explosive charges.

3053. Drilling Prior to Setting Explosives

'This very coarse lumpy mine run coal is the result of proper shooting. The miner is paid on a tonnage basis for loading this coal into mine cars. He is required to watch his coal carefully as he loads it and see that no impurities become mixed with the coal.'

3054. Miner Prepares to Load Coal After Shooting

Two miners work with a cutting machine at Pursglove No. 15.

3055. Miners Operating a Cutting Machine at Pursglove No. 15

Miner drilling holes for explosives at Jamison No. 9.

3056. Drilling Prior to 'Setting' Explosives at Jamison No. 9

Electric mine locomotive at Mathies Coal mine, Finleyville, PA.

3057. G-E 50 Ton Electric Mine Locomotive in Operation at Mathies Coal Mine, Finleyville, Pa.

Two miners working to support the roof in the Itmann Coal Co. mine. <br /><br />

3058. Miners at Work in an Itmann Coal Company Mine

A miner is operating a cutting machine at the Price Hill Colliery Co. mine

3059. Miner Operating a Cutting Machine, Price Hill Colliery Company

Chalk markings designate slate intrusion in No. 63.

3060. Slate Intrusion at No. 63