PROJECT 10 (Continued) 



warm weather or cracking when it contracts in cold weather, and it may be divided by building 

 a section at a time, or by cutting the walk into sections while " green," by means of a trowel. 



3. To make steps of concrete proceed as above for the foundation. Make 

 frames for each step desired as shown in Fig. 158. 



4. Hog troughs. A hog trough may be made by making a narrow box 

 frame for the outside form and using a small straight section of a log for 

 the inside form. Grease the inside of the forms and pour full of concrete 

 made by mixing one part of cement to three parts of coarse sand moistened 

 until it is a thick mortar. Tamp the concrete gently until water rises on 

 the top, level with a straightedge, and smooth with a float or trowel. In 

 about ten days remove the forms and soak the trough with water. While it is wet, paint the inside 

 with a coat of pure cement mixed with water to the consistency of heavy paint. Keep the mixture 

 thoroughly moistened for some time after applying, for unless it dries very slowly it will crack and 

 peel off. 



Fig. 159. 



Cross section of hog 

 trough 



[211] 



