216 FEEDING ANIMALS. 



leaving the lath under the wall and offering no obstruction 

 to the removal of the standards after the wall is built. 

 Now a bracket should be nailed across the top and the pair 

 of standards set accurately plumb on the inside edge and 

 solidly stay-lathed in that position. It is well to stay-lath 

 across the top of the silo from standard to standard besides 

 bracing from the outside ; for it is of the utmost import- 

 ance that the standards should not move, as that will 

 throw the wall out of plumb. When the standards are all 

 set about the proposed walls, and the boxing planks are all 

 placed, we are ready for 



PREPARING THE CONCRETE. 



The first tier on the bottom of the wall should be made 

 wholly with water-lime concrete, as follows: Mix well one 

 part of Akron or Rosendale cement with three parts of 

 fine sand, while dry. You may now mix in also three or 

 four parts of clean gravel ; now mix into thin mortar and 

 place a layer of this mortar, two or three inches thick, in 

 the bottom of the wall-box, and if you have cobble or 

 rough stones, or any irregular stones picked from the field, 

 bed these in the mortar, taking care not to let them come 

 quite out to the boxing plank. Use all the stone you can 

 get in, taking care to have a layer of mortar between them; 

 tamp it all down solid so as to have no spaces in the wall. 

 Fill the boxing to the top, using a layer of mortar and a 

 layer of stone alternately. 



For the next layer of wall, and all above, if you desire to 

 use some quick-lime, which is cheaper, then mix as follows: 

 One part of cement with six of fine sand, while dry. Mix 

 in four parts of gravel as before. Have a vat of quick- 

 lime, well slaked under water, standing near, and use this 

 thin milk of lime to wet up and mix into mortar the water- 

 lime, sand and gravel. Make a calculation so as to get 

 about one part of dry quick-lime to eight of sand used. 



