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Coal Measures and Coal Mining in Iowa, including paleontology and a discussion on the coal formation; also the methods of mining by Russell T. Hartman, 1898

Coal Measures and Coal Mining in Iowa by Russell T. Hartman, 1898, Page 204

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[page]204.[/page] the nub coal; or the nub and finer coals may be separated by revolving screens. But, in whatever way the screening is done it is all performed between the tower and the railroad car on the track at the bottom of the tower. In weighing the coal: the railroad car is first weighed, then as each mine car of coal is run into the railroad car the increase in weight in [?is?] noted. Then the miner is credited with the weight which his coal adds to the weight of the car. It is a usual thing in Iowa to pay the miners by the ton of lump coal which the [?they?] get out. It can hence be seen that it is to the advantage of both miner and mine owner to have the miners get out lump coal. To prevent
 
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