From Introduction: "The purpose of this bulletin is to point out the most efficient methods and equipment now in use in slate quarries, to describe methods of utilizing the quarried material to best advantage, and to outline means of reducing the proportion of waste, which is now excessive."
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Added Title:
United States Bureau of Mines Bulletin 218
Description
From Introduction: "The purpose of this bulletin is to point out the most efficient methods and equipment now in use in slate quarries, to describe methods of utilizing the quarried material to best advantage, and to outline means of reducing the proportion of waste, which is now excessive."
Physical Description
148 p. : ill.
Notes
"A thesis submitted to the faculty of George Washington University in part fulfillment of the requirement for the degree of Doctor of Philosophy"
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