154 



Concrete Silos 



16 inches wide at the center and 13 inches at the mid- 

 dle. Each block is reinforced with two %-inch steel 

 rods, each end of each rod projecting into a small 

 cavity. When the blocks are laid up these ends are 

 connected and brought to tension by a special tool. 

 The cavity is then filled with concrete. 



Millers' Sectional Interlocking Block Silo. This 

 system is controlled by the Goshen Concrete Tile 

 Manufacturing Company, Goshen, Indiana. The blocks 

 in this system are solid 

 blocks made of slush 

 concrete interlocking 

 at all edges. A double 

 rod of 5-16-inch iron 

 through each- bloc.k 

 makes the reinforcing 

 and forms an eye at 

 the end of each block. 

 The blocks are fas- 

 tened together by 

 means of a staple 

 passing through these 

 eyes, the open spaces around the eyes and staples 

 then being filled with mortar. The door frame used 

 in connection with these blocks is constructed of chan- 

 nel iron. On the side of the door jamb toward the block, 

 there are eyes every 12 inches to correspond with the 

 eyes on the block, so the door frame and blocks are 

 locked together by means of staples and spaces 

 filled with mortar, making joints same as between the 

 blocks themselves. 



Perfect Cement Blocks. This is made on the per- 

 fect cement block machine, manufactured by J. J. 

 Coyne, Fond du Lac, "Wisconsin. This machine makes 



Miller's 



Interlocking 



Block 



