SUPPLEMENTARY CONCRETE PROJECTS 181 



6) Mix concrete 1:2:4 proportion to a wet consistency, 

 except for the top of arch, which should be to a quaky 

 consistency. 



7) Place concrete in lower side wall. 



8) Place heavy hog wire from lower walls over arch to in- 

 sure against shrinkage cracks. 



9) Place concrete over arch. 



10) Keep concrete from being exposed to extreme heat of 

 sun and moisten each day. 



11) Remove forms after a period of about one week. 



12) Finish job by smoothing off rough places with a brush 

 and by plastering where necessary. 



157. Hog Wallow (Fig. 170). 



Requirements: To excavate for hog wallow suitable for 20 or 

 30 hogs weighing 200 pounds each. To construct 

 form and provide overflow drain and inlet pipe similar 

 to drain and inlet for tank described in Sec. .145. 

 To reinforce floor and side walls of wallow with wire 

 mesh. 



Note: Refer to project under Sec. 145. 

 Instructions: 



1) Excavate and prepare foundation for wallow. 



2) Place inlet and overflow pipes. 



3) Construct inner form ready for use. 



4) Construct form for box to protect inlet and overflow 

 pipes. 



5) Use a 1 : 2 : 4 proportion and mix concrete to a quaky 

 consistency. 



6) Place floor about 4" thick. 



7) Put reinforcing in place across the floor and extending 

 up the wall, as illustrated in cross-section. 



