Cement for the Farm. 



447 



SILO, BARN FOUND ATIOX, CULVERTS, 



I have a concrete silo 50 feet high, 16 feet in diameter and with 

 a solid 6-inch wall. We excavated 6 feet below the surface of the 

 ground for the foundation and made the circular foundation wall 12 

 inches thick to the top of the ground. On this we built the silo wall 

 6 inches thick for the entire height. 



Figure 38. Built by Ed. Zimmerman, Garden City, Mo. 



The inside forms were made of ordinary cypress weather- 

 boarding, nailed to 2x4 pieces 8 feet long, and set 2 feet apart 

 around the inside. We had two sets of these 8-foot forms, and as 

 we reached the top of one we would nail to the next, leaving 6 to 

 8 inches of lap, and plumbing up carefully with a plumb. 



