STONE AND CEMENT CONSTRUCTION. 



497 



FIG. 1 Plan of the silos showing a convenient arrangement for feeding. 



Silos were built at the following places and the size and cost 

 is given as follows in a station report of 1910: 



Size. Cost. 



Silo at Linn Grove 16 ft. in diameter, 35 ft. high $308 



Silo at Rock Valley 16 ft. in diameter, 35 ft. high 350 



Silo at Rock Valley 16 ft. in diameter, 37 ft. high 282 



Silo at Laurens 18 ft. in diameter, 36 ft. high 285.28 



Silo at Laurens 16 ft. in diameter, 30 ft. high 215 



Two silos at Ottumwa... 18 ft. in diameter, 35 ft. high 750.37 



PROBLEM. 



Find the capacity of each of the above silos and the cost per ton ca- 

 pacity. 



32 



