By the end of the nineteenth century, Pittsburgh emerged as a major manufacturing center in the United States. Its rise as a leading producer of steel, glass, and coal was fueled by machine technology
By the end of the nineteenth century, Pittsburgh emerged as a major manufacturing center in the United States. Its rise as a leading producer of steel, glass, and coal was fueled by machine technology
The Appalachian Mountains attracted an endless stream of visitors in the twentieth century, each bearing visions of what they would encounter. Well before large numbers of tourists took to the mountai
