PROJECTS IN CONCRETE CONSTRUCTION 161 



Then fill the form full of the mixture, tamp it lightly, 

 and smooth off the surface. Press two more rods in 

 place at each corner about 1/2". under the surface; 

 then smooth the surface to proper finish. 



5) Leave the posts in the molds at least forty-eight hours 

 under most conditions. If the weather is extremely 

 dry and hot, they may be removed earlier. To take 

 out the post, turn down the hinged end of the form, 

 lift the dividing boards between the posts, then grasp 

 the post and slide it on the bottom of form by a pulling 

 motion; after it is loosened, it may be lifted out. Han- 

 dle the posts with care when green as they are liable 

 to be broken. 



6) Set the post on end in sand to cure. Sprinkle daily 

 in dry weather for a week. Do not use until the posts 

 are one month old. 



145. Constructing a Circular Stock Tank (Figs. 154, 

 154-a and 155). 



Requirements: To construct form according to plan, prepare 

 foundation and construct a circular stock tank to 

 be provided with inlet pipe with float control and 

 outlet. Plumbing work is outlined in Sec. 351 under 

 head of "Plumbing." 



Tools Needed: Same as in preceding projects. 



Materials Needed: Enough cement, sand and gravel, or 

 crushed rock, to construct tank of a 1 : 2 : 4 mixture 

 according to plan. Enough heavy hog wire 30" high to 

 extend around tank and lap 30", and enough to extend 

 twice across the bottom and up the sides. For a tank 



