16 



from Mr. Howard, referred to above. Two of the trees were 5 feet 

 tall by 4 in diameter, while the others ranged from 14 to 18 feet tall 

 by from 12 to 16 feet in diameter. They were sprayed between the 

 hoars of 3 and 5.30 p. in.; sun shining, light breeze. Three hundred 

 gallons of the diluted compound were used. A tree 16 feet tall by 14 

 feet in diameter required about 14 gallons of the compound, and three 

 men and a spraying outfit will spray about 800 gallons in a day. The 

 cost of materials and labor in spraying with this compound a tree of 

 the size indicated above amounts to about 24 cents per tree. I exam- 

 ined the above-mentioned trees September 24, and again October 

 19, and found that the leaves and fruit were uninjured, but a few of 

 the oranges had small brown spots on them as described above in ex- 

 periment 199. Nearly all of the scales located on the leaves and bark 

 were dead, but about one-fourth of those located upon the fruit were 

 still alive. 



(193, 196) Eesin 28 pounds, fish oil 4 pints, caustic soda 8 pounds, 

 water to make 100 gallons ; costs $1.10. Sprayed on two orange trees 

 at 1.15 and 12.20 p. m., July 19 and August 7; sun shining in the 

 first, cloudy in the second, light breeze. August 6, September 2, 

 and October 19, leaves uninjured; some of the oranges had brown 

 spots on them as described above in experiment 199 ; found only one 

 live scale on the leaves, and three on the fruit. 



(202) Resin 21 pounds, fish oil 3 pints, crude potash 4 pounds, water 

 to make 100 gallons; costs 85 cents. Sprayed on an orange tree at 

 12.30 p. m., August 8; sun shining, light breeze. September 2, 

 leaves uninjured; some of the oranges had brown spots on them as de- 

 scribed above in experiment 199 ; found many live scales both on the 

 leaves and fruit. 



(203) Resin 28 pounds, fish oil 4 pints, potash 5J pounds?, water to 

 make 100 gallons; costs $1.15. Sprayed on an orange tree at 1 p, m., 

 August 8 ; sun shining, light breeze. September 2, same as in the 

 preceding experiment. 



(183) Resin 20 pounds, tallow 6J pounds, caustic soda 6J pounds, 

 water to make 100 gallons; costs 98 cents. Sprayed on a lemon tree 

 at 12 in., July 17 ; sun shining, light breeze. August 6, a few of the 

 older leaves were injured ; found great many live red scales. 



(184) Resin 25 pounds, tallow 8 pounds, caustic soda 8 pounds, water 

 to make 100 gallons ; costs $1.22. Sprayed on an orange tree at 12.30 

 p. in., July 17 ; sun shining, light breeze. August 6, leaves uninjured ♦, 

 found three live red scales. 



(188) Resin 17 pounds, tallow 6 pounds, caustic soda 6 pounds, water 

 to make 100 gallons; costs 88 cents. Sprayed on an orange tree at 1 

 p. in., July 18 ; sun shining, light breeze. August 6, leaves and newest 

 growth uninjured ; found twelve live red scales. 



(1S9) Resin 22 pounds, tallow 8 pounds, caustic soda 8 pounds, water 

 to make 100 gallons ; costs $1.16. Sprayed on a lemon tree at 1.15 



