154 



ENGINEERING ON THE FARM 



Fig. 150. Showing the spatter-coat fin isli 



on upper wall, carpet-covered float finish 



on water table, and the surface of 



lower wall and columns as 



left by the forms 



slippery and is more 

 desirable for steps and 

 sidewalks. (See Fig. 

 149.) 



Spading. Vertical sur- 

 faces of concrete which 

 has been placed in the 

 form can be kept smooth 

 at the time of casting by 

 means of a spade or flat 

 steel tool run next the 

 form and worked back 

 and forth. This forces 

 the coarser materials 

 back into the wall and 

 brings the cement to the 

 surface and is known as 

 spading. 



Coloring. When it is 

 desired to color the face 



Fig. 151. Method of applying spatter coal 



