32 



on a pear tree at 12:30 p. m., November 26, sun shining, light breeze. 

 This did not kill all of the green leaves that were upon the tree. Jan- 

 uary 15 I found a great many living San Jose scales on this tree. 



Experiment 228 : Salt, 38 pounds ; water, 100 gallons. Dissolved the 

 salt in water as before and sprayed on a pear tree at noon, November 26, 

 sun shining, light breeze. This killed all of the green leaves that were 

 upon the tree. January 15, 1 found many living San Jose scales on this 

 tree. 



Experiment 237 : Salt, 60 pounds ; water, 100 gallons. Dissolved the 

 salt as before and sprayed on a pear tree at 10 a. in., January 20, sun 

 shining, light breeze. April 23, I found a great many living San Jose 

 scales on this tree. 



Salt and Lime. — Experiment 238 : Salt, 25 pounds ; slaked lime, 

 8J pounds ; water, 100 gallons. The salt and lime were added to the 

 cold water, stirred occasionally, and strained through a piece of Swiss 

 muslin and then sprayed upon a pear tree at 10:30 a. m., January 30, 

 sun shining, light breeze. April*23 I found a great many living San 

 Jose scales on this tree. 



Salt and Sulphur. — Experiment 232 : Salt, 25 pounds ; sulphur, 

 75 pounds ; water, enough to make 100 gallons. The sulphur was boiled 

 for an hour in 75 gallons of water, after which the salt was added, and 

 the solution diluted with a sufficient quantity of cold water to make 100 

 gallons. After standing for a few minutes the greater portion of the 

 sulphur settled to the bottom, making it necessary to stir the solution 

 almost constantly while applying it to the tree. Sprayed on a pear tree 

 at 2:45 p. m., November 26, sun shining, light breeze ; this killed all of 

 the green leaves on the tree. January 15 I found a great many living 

 San Jose scales on this tree. 



Sulphur. — Experiment 233 : Sulphur, 100 pounds ; water, enough to 

 make 100 gallons. Placed the sulphur in the water and boiled for 1 

 hour, then when cold, sprayed the solution on a pear tree at 3 p. m. 

 November 26, sun shining, light breeze. This did not injure any of the 

 green leaves that were on the tree. January 15 I found a great many 

 living San Jose scales on this tree, a smaller proportion being killed 

 than in either of the preceding experiments. 



Lime. — Experiment 239: Slaked lime, 10 pounds ; water, enough 

 to make 100 gallons. The lime was placed in the water, stirred occa- 

 sionally and in two hours the solution was strained through a piece of 

 thin Swiss muslin and sprayed upon a pear tree at 10:45 a. m. January 

 20, sun shining, light breeze. April 23, I found a great many living 

 San Jose scales on this tree. 



Lime and Sulphur. — Experiment 240: Quicklime (CaO), 100 

 pounds; sulphur, 33^- pounds; water, enough to make 100 gallons. 

 Placed the lime and sulphur in a copper vessel, added 30 gallons of 

 water, and boiled for two hours, then filtered. The solution was of a deep 

 orange red color. After standing for a few minutes needle-like crystals 



