170 Windmills Used for Pumping. 



and there, as this upper millstone turns around, 

 the wheat is ground into flour, which drops out 

 all around the edges of the stone. This flour 

 is sifted, and put into barrels, and then sold to 

 those who wish to make bread, biscuit, cakes, 

 pies, or anything else from it. 



4. Sometimes this is done by steam-mills, 

 and one of those here in front may be a steam 

 flouring-mill (see chart.) 



5. The earth gives the grain ; fire gives its power to 

 the steam-miil, and is used in baking the bread ; water 

 must be mixed with the flour to make dough ; air must be 

 got into the dough so as to raise it up and make it light; 

 air also helps the windmill to grind the flour; it is, there- 

 fore, clear that fire, air, earth, and water all contribute to 

 the making of our bread. 



6. In Holland, where the land in some 

 places is lower than the surface of the sea, hun- 

 dreds of windmills are placed along the dikes 

 for the same purpose. They can also be seen in 

 this country near some large country-seats, where 

 they are used to pump up water, so that it may 

 be had in the highest stories of the houses. 



REVIEW. OF CHAPTER XVI. 



What are the uses of windmills ? What moves their 

 wheels ? What are made from flour ? How is bread made ? 



SPELLING AND WRITING EXERCISE. 



