42 Fences, Walls and Hedges 



together with bonds which may be brick 

 laid the long-ways across or may be of 

 metal, special metal bonds coming for this 

 purpose. Hollow walls on account of the 

 air space retain heat longer than solid 

 walls while they require 25 fo less brick 

 than the latter. 



If we find that a wall, for its length, 

 height and position, should require twelve 

 inches of thickness, it would not always 



The commonest methods of bricklaying and fin- 

 ishing the mortar joints. At the left is a sec- 

 tion of a properly built hollow wall 



be necessary to make the entire length so 

 deep. By putting in piers at say eight or 

 ten foot intervals and making them sixteen 

 inches or more square, the wall could be 

 reduced to eight inches. These piers 

 stiffen the wall, act as buttresses and help 

 give lateral strength. If the piers are of 

 great height, ten feet or over, a bond stone, 

 which is a stone four or more inches thick 

 running through the entire pier, helps tie 



