 The boom of investment in the coal industry and predicted large-scale production of anthracite coal shifted the mentality of the Pennsylvania state government, and the legislature dramatically increased the number and quality of charters it granted to mining companies (Adams, “Different Charters”).Individual proprietors fell to the expansion of corporations who could master the large-scale production and efficient transportation that the wartime economy called for.The major railroad companies came to dominate the industry as they began to purchase coalfields in order to control both the production and shipping aspects.