41 



and 4 pints had been used, and found 2 days later that this additional 

 water still increased the effect. 



In addition to this a number of plants were treated with this compound 

 to note the results next spring. The holes were made 2 feet in diameter, 

 and after the solution had disappeared f he wet ground from the outside 

 was placed around the plant and the hole closed again. The experi- 

 ments were: Five piuts of compound in 5 gallons of the solution, four 

 plants; 4 pints of compound in 5 gallons of the solution, eight plants ; 

 3 pints of compound in 5 gallons of the solution, ten plants ; and 2 pints 

 of compound in 5 gallons of the solution, ten plants. 



Compound No. 3. — Caustic soda, 98 per cent, 1 pound ; resin, 8 pounds ; 

 and tvater to make 10 gallons of compound, costing 22 cents. 



Compound, 4 pints ; water, 7 J gallons. Examined 6 days later ; result 

 good. 



Compound, 4 pints ; water, 10 gallons. Examined 6 days later and 

 found result favorable. 



Compound, 3 pints ; water, 75 pints. Found only part of insects de- 

 stroyed 6 days later. 



Compound, 3 piuts ; water, 90 pints. There were not enough insects 

 upon this plant to deduce fair results, which would no doubt be very 

 poor. 



Compound No. 4. — Sal soda, 3 pounds; resin, 4 pounds ; and tvater to 

 make 5 gallons of compound ; costing 11 cents. 



Compound, 4 pints ; water, 7 J gallons. Examined 5 days later and 

 found all insects killed except a few living on a plant under thick bark, 

 where solution apparently did not penetrate. 



Compound, 4 pints; water, 10 gallons. Examined 5 days later and 

 found insects dead to 12 inches in depth from original surface, with only 

 occasionally a live one walking about. 



Compound, 3 pints ; water, 75 pints. On examining, 5 days later, 

 only the insects near surface were found dead. 



Compound, 4 pints ; water, 15 gallons. This destroyed only partly 

 the lice near the top. 



The following four experiments were made with this compound, the 

 ground having been previously soaked with 4 gallons of water : 



Compound, 3 pints; water, 21 pints. Examined 12 days later. Did 

 not show good results, as part of the insects were found alive. Twice 

 the amount of water with the same quantity of compound will do much 

 better work. 



Compound, 3 pints ; water, 33 pints. Examined 12 days later and 

 found results fairly good. Only a few living ones were running about. 



Compound, 2 pints; water, 30 pints. On examination numerous live 

 insects were found, but more than half were killed. 



