WATER WHEELS. 



Fig. i shows a model of the so-called breast wheel, a familiar type of water 

 wheel that has been in use since the time of the Romans. Figs. 2 and 3 show similar 

 wheels as used to-day in Belgium. Fig. 4 shows a model of Fourneyron's turbine. 

 This wheel was made in 1837, but the original turbine was introduced by Fourneyron 

 in 1827. The turbine wheel has now almost supplanted the other forms of water 

 wheel except in rural districts. 



