Sources of Limestone, Gypsum, and Anhydrite for Dusting Coal Mines to Prevent Explosions
Description:
From Preface: "The writer began testing the rock-dusting method for the Bureau of Mines at the Pittsburgh gallery in 1909, and later continued such testing in the bureau's experimental mine, with favorable results. Beginning in 1911 the bureau issued reports recommending rock dusting as alternative to watering."
Date:
1925
Creator:
Bowles, Oliver
Item Type:
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