REMEDIES. 369 



gives : density, 1074 ; alkaliiiit'tLT, 10. Cost per case of 48 

 lbs., $4.50, or about 9^ cents per pound. 



Cost of caustic soda (English), in drums, 5-^ cents per pound ; 

 commercial potash, in drums, 9 cents per pound. 



Formula No. 1. 



One pound of caustic soda (Eng.) 



Two ounces of commercial potash (^ pound). 



Dissolved in one gallon of water (tested with the alkali- 

 meter, as above) : density, 1090; alkalimeter, 12. 



This formuhi produces a solution of a higher density than 

 the concentrated, lye at a cost of 



42f pounds of caustic soda, at 5^ cts., $2.35. 



5^ pounds of commercial potash, at 9 cts., .48 — Total, $2.83. 

 (Less than six cents per pound.) 



Formula No. 2. 



One pound of caustic soda (Eng.) 



Four ounces commercial potash (^ pound). 



Dissolved in one gallon of water (tested with alkalimeter as 

 above) : density, 1094 ; alkalimeter, 12^. 



38:^ pounds caustic soda (Eng.) at 5 cts., $2.12. 



^\ pounds commercial potash, at 9 cts., .85^ — $2.97^. (Less 

 than 65 cts. per pound.) 



This formula produces a solution of a higher density than 

 either of the above, and is not only a superior insecticide, but 

 a richer source of fertilization for the tree. 



Note. — The data from the alkalimeter is merely given to 

 show the difference in density as indicated by one instrument. 



To dissolve the above material thoroughly the time required 

 is about forty-eight hours ; use boiling water. To make a 

 certain quantity of No. 12, one ninth of the total weight of 

 material required is potash and eight ninths caustic soda. 



Example. — To make forty-five gallons of solution No. 12 

 (one pound to each gallon of water) it requires forty-five 

 pounds of material (i. e., caustic soda and potash); ^ of 45 

 pounds equals 5 pounds of potash ; | of 45 pounds equals 40 

 pounds, giving 5 pounds potash and 40 pounds caustic soda 

 in 45 pounds of the mixture. 



