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The Origin of Coal

Description: From Introduction: "The purpose of the studies that form the basis of this report was to learn from microscopic examinations of coal how far and in what ways the grouping of coal by types depends on differences in the kinds of plant material from which it was formed and on the conditions of its accumulation, or how far the special characters or qualities of coal of any type were determined by the nature and the state of the plate debris from which the coal was formed."
Date: 1913
Creator: White, David & Thiessen, Reinhardt
Partner: UNT Libraries Government Documents Department