Monolithic Concrete Silos 



The Polk System 



OF 



RE-ENFORCED MONOLITHIC CONCRETE 

 CONSTRUCTION 



Pat. Oct. 23, 1906 

 Pat. Dec. 29, 1908 



C. F. WIELAND 



CONSULTING ENGINEER 

 914 Mutual Savings Bank Bld. 



SAN FRANCISCO, CAL. 



POLK-GENUNG-POLK CO. 



INCORPORATED 



FORT BRANCH, IND. 



