UNIVERSAL PORTLAND CEMENT CO. 
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the silo walls; chute walls of concrete block silos must also be built at 
the same time, being built in and kept at the same level as the silo walls. 
The monolithic chute illustrated on page 80 is practically self-explan- 
atory, as is the chute of concrete block shown on this page. 
The later forms put out by the best silo form manufacturing com- 
panies now provide chute and roof forms, so that the construction is com- 
paratively a simple matter. 
If the block silo and chute are put up simultaneously the walls of the 
two will be held together by the blocks, and no reinforcing will be neces- 
Block sary. Window openings in the chute may be made by using 
Chutes concrete sills and lintels, which are easily obtainable from block 
dealers. A length of heavy strap iron may be substituted for a 
lintel, if desired, and the sill cast in place by means of a simple box mold. 
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