ILLUSTRATION. 



123 





possible and obtain the required strength. By reinforcing 

 the concrete with steel much cement is saved. In Europe, 

 and particularly in France, reinforced concrete has been 

 very extensively used and used with much boldness. A 

 simple instance will illustrate: 



"A large elevator and mill in Prance was constructed 

 wholly of reinforced concrete, walls, floors, beams, and 

 posts. The mill is 112 feet high from foundation to roof. 

 The roof is used as a reservoir holding 100 tons of water. 

 The capacity of the elevator is 7,000 tons. The walls are 

 only 12 inches thick at the foot and 4 Inches at the top. 



Fig. 28. Large cement silo and barns at Posto Zootechnico Central (Ex- 

 periment Station) at Sao Paulo, Brazil, South America. Silo being filled 

 with No. 17 Ohio Blower Machine. 



