id 
PLATE II. 
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a SSS a ere ee SS 
THE PROPER WAY TO USE PARADICHLOROBENZENE. 
1. The soil around the tree is made ready for treatment. 2. The paradichlorobenzene is applied in 
a continuous ring 2 inches wide and 1 inch from the tree trunk. This is the correct method. 
3. Several shovelfuls of soil are placed on the crystals and compacted, to hold the gas and pre- 
vent surface washing. 4. In the case of young trees, the base is uncovered four weeks after the 
paradichlorobenzene is applied. 
