... as the Mercator map, the steam engine, the Bessemerprocess for making steel, the use of dynamite, and the harnessing of electricity from water power allshaped the future of the river in profound ... runoff.During the early part of the twentieth centurylarge power plants were constructed along the shores of the Lower Hudson, some in the region of the salt front, that is, unknowingly in the ... HenshawCHAPTER 19Birth of the Environmental Movementin the Hudson River Valley 279Albert K. ButzelCHAPTER 20 The Influence of the Hudson River School of Art in the Preservation of the River,Its Natural...