15 



drum of 800 pounds ; of fish-oil, by the barrel of 50 gallons ; of potash, 

 by the cask of 700 pounds; and of tallow, by the barrel of 375 pounds. 



(181) Resin, 25 pounds; eanstic soda, 3 pounds; water to make 100 

 gallons ; costs 65 cents. The diluted solution was of a light brown color. 

 Sprayed on an orange tree at 11.30 a. rn., July 17, sun shining, light 

 breeze. August 6, foliage uninjured; found a great many live scales. 



(182) Resin, 33 pounds; caustic soda, 4 pounds; water to make 100 

 gallons ; costs 84 cents. Sprayed on an orange tree at 11.45 a. in., July 

 17, sun shining, light breeze. August 6, foliage uninjured; found great 

 many live scales. 



(199,200) Resin, 25 pounds; caustic soda, 6 pounds; water to make 

 100 gallons ; costs 77 cents. Sprayed on two orange trees at 10.45 and 

 and 11 a. m., August 7, sun shining, light breeze. September 2, found 

 great many live scales, especially on the fruit ; leaves uninjured; many 

 of the half-grown oranges have rusty, brownish spots on their under 

 sides, or where they came in contact with each other or with a branch 

 or other object. These spots were still present October 19, but whether 

 they will disappear or not before the fruit ripens remains to be seen. 



(201) Resin, 33 pounds; caustic soda, 8 pounds; water to make 100 

 gallons; costs $1. Sprayed on an orange tree at 11.15 a. m., August 

 7, sun shining, light breeze. September 2, same as in the preceding 

 experiment. 



(190) Resin 16 pounds, fish-oil 6 pints, caustic soda 6 pounds, water 

 to make 100 gallons, costs 85 cents. The diluted solution was of a very 

 dark brown color. Sprayed on a lemon and orange tree (i. e. orange 

 budded to lemon, but the orange branches not cut away) at 1:30 p. in., 

 July 18, sun shining, light breeze. August 6, leaves and newest growth 

 uninjured; found ten live scales. 



(191) Resin 22 pounds, fish oil 1 gallon, caustic soda 8 pounds, water 

 to make 100 gallons; costs 81.15. Sprayed on an orange tree at 2 p. in., 

 July 18, sun shining, light breeze. August 6, a few of the older leaves 

 have brownish spots on their under sides ; found three live scales. 



(192,195) Resin 20 pounds, fish oil 3 pints, caustic soda 6 pounds, 

 water to make 100 gallons ; costs 80 cents. Sprayed on a lemon and 

 on an orange tree at 1 and at 12:10 p. m., July 19, and August 7 ; sun 

 shining in the first, cloudy in the second experiment, light breeze. 

 August 6, in first experiment leaves uninjured; found two live scales. 

 September 2, in second, experiment leaves uninjured ; found 12 live 

 scales on the fruit and 8 on under side of the leaves where they had 

 evidently escaped the spray. In both experiments the fruit was as 

 described in experiment 199 above, but to a less degree. 



The formula in these two experiments was the same, except that in 

 192 one pound more of the resin was used than in 195; but this small 

 quantity in 100 gallons could scarcely have affected the results. This 

 is the same formula used on September 3 of the present year (1889) 

 for spraying twenty-five orange trees, in accordance with instructions 



