Water-wheels How Used. 



Overshot-wheel. Breast-wheel. Undershot-wheel. 



Make the wheels in the blackboard drawing 1 12 inches in 

 diameter, and instruct the class that a mill-wheel is about 

 12 feet in diameter, making: the comparison on the wall of 

 the room. 



7. How this water-wheel turns other wheels 

 and the stones inside the mill so as grind wheat 

 into flour, corn into meal, or to saw logs into 

 boards, you will learn in a lesson further on. 



8. As the wheels of all mills are not turned 

 by water in precisely the same way, you may 

 see from the blackboard drawing three different 

 ways of applying the water to the wheels. 



9. The water-wheel on the left hand of the 

 chart is called an overshot-wheel, because the 

 water is shot over it. 



10. When the water comes just abreast of the 

 axle of the wheel it is called a breast-wheel. 



1 1. One which is turned by a stream running 

 under it is called an undershot-wheel. 



12. Such a one is used by the washerwomen 

 in Paris, where it is attached to the side of a 

 large, stout boat that is held fast by anchors or 

 cables, and does their work for them. 



