The two kinds of wheels, center-vent and circumferential vent, are commonly called " turbines." The water passes through the buckets of the former from the outside to the inside ; through the ...

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The accompanying engravings represent a horizontal, center-vent water wheel invented by James Martin, of Florence, Ala , which is now in use by the patentee, driving a cotton mill, and working in ...

This is "Mr.Trash Wheel" – a water wheel in Baltimore that removes rubbish from the river. The water wheel is powered by the river's current, which lifts rubbish and debris from the water and ...

This wheel can pump water to villages over a mile away. It can pump 43,000 litres of water a day. Pumps already operate in 12 different countries, including Nepal, Indonesia, Spain, and Zambia.

Pupils could look at how a water wheel works, and investigate how the water keeps it turning. They could come up with other ways the den could be made environmentally friendly. How fibreglass can ...