THE SOURCE OF FOOD FOR TERMITES IS WOOD (CELLULOSE) 
Termite infestation may also be evidenced by the presence of earth-like shelter 
tubes, which these insects may construct over the surfaces of foundation walls 
or other materials to afford additional runways between the soil and their 
source of food. These tubes vary in size and shape, being from one-fourth to 
one-half-inch or more in width and flattened against the supporting surface. 
They serve as covered passageways between the wood and the essential mois- 
ture in the soil and protect the termites from the drying effect of direct exposure 
to the air. Termite damage to wood is often not evident from the exterior. 
Cracks or holes in mortar or cinder blocks are utilized by Termites and tunnel- 
ing on the surface may be absent. Careful inspection will soon disclose their 
source. 


Fig. 4—Evidence of termite damage from Fig. 5—Siding removed from the same build- 
the outside of a building, which Is usually ing to reveal extent of damage fo the sill, 
inconspicuous. studding, and subsiding. 
At the bottom of this damage, Figure 4 or 5, a shallow trench should be dug 
(as explained under Method 1). At the bottom of this trench, apply Termitgas.* 
Give it a fair application, and as you are replacing the trench with earth, 
gradually add more and more Termitgas, until the trench is refilled. You will 
find that the Termitgas infiltrates into tne ground to a very considerable depth, 
and is not alone deadly to Termites but to many species of ant life. A gallon 
of Termitgas is amply sufficient for tem linear feet of Trench. 
DO IT YOURSELF! 
