Appendix. 



165 



Tree No. 16. — A fifteen-foot tree, with an eight-inch trunk and a fifteen- 

 foot top; in fair condition, but badly infested. This tree received no 

 water treatment until the fourteenth day, when thirty gallons were ap- 

 plied. Forty-eight per cent of the scales alive March 4; eighty-one per 

 cent of these dead on the fifth day, and ninety-two per cent on the 

 twelfth, with a general final average of ninety-three per cent destroyed. 

 The corresponding tree of the other lot is No. 9, which shows a final 

 average destruction of eighty-nine per cent. 



Lot IV. Spr.wkd with Li.mk, Sili-jilk, axd Bli'k Vitkiuj., March 5. 



Tree No. 17. — An eighteen-foot tree, with a nine-inch trunk and an 

 eighteen-foot top; in poor condition, and badly infested. A check tree, 

 receiving no water treatment, the effect of the insecticide being conse- 

 quently modified only by the three rains described. Forty-one per cent 

 of the scales alive in the beginning; sixty-eight per cent of these dead in 

 three days, and ninety-five per cent in twelve, with a general average of 

 ninety-five per cent finally destroyed. This, it will be noticed, is the 

 same final average result as that of the companion experimental tree. 

 No. 10. 



