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Popular Science Monthly
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���"In the deep recesses behind the falling sheet of water at Niagara," says Prof. Norton in his article, "a gigantic system of scaffolds would be erected. These would serve as the supports of a series of over-shot wheels or endless-chain bucket wheels. By careful disposition a considerable fraction of the available power — possibly thirty to forty per cent. — could be utilized without revealing any portion of the mechanism to the eye of the beholder"
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