img The Scientific American Boy; Or, The Camp at Willow Clump Island  /  Chapter 21 THE WATER WHEEL. | 84.00%
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Chapter 21 THE WATER WHEEL.

Word Count: 2687    |    Released on: 01/12/2017

ks' "Hydraulics" in the school library. It was a book describing machines of the ancients–principally devices for ra

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