Stronger than One Hundred Men: the Vertical Waterwheel

"Historians of technology have distinguished five eras in the history of technology: an era dominated by human muscle power, an era when human power was supplemented by animal power, an era of water power, an era of steam power, and an era of nuclear power. In each of these eras the major source of power, or energy, determined the types of products that emerged and the size of the machinery and tools developed to make these products..."



United States

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