water wheel

Water Wheel test
This is the water wheel (A device that keeps water out of mines) in Caernarfon Wales at the slate mine.    This is no longer a working mine, but is open as a tourist attraction.    We saw demonstrations of the slate cutting.   WOW.

This is a very large wheel.   I have also seen the Laxey Wheel on the Isle of Mann.,   The Laxey Wheel also known as Lady Isabella is the largest working wheel in the world.