Report of State Board of Horticulture. 79 



Ions, making a mark to indicate the fifty-gallon point ; weigh 

 out one hundred pounds of fresh lime, place it in the barrel 

 and slack it ; when slacked, add sufficient water to bring the 

 whole mass up to fifty gallons. Each gallon of this prepara- 

 tion contains, after thorough stirring, two pounds of lime. 



When it is desired to make bordeaux mixture of the fifty- 

 gallon formula, it is only necessary to measure out three gal- 

 lons of the stock copper solution, and, after thorough stirring, 

 two gallons of the stock lime ; dilute each to twenty-five 

 gallons, mix, stir, and test as already described. One test 

 will be sufficient in this case. In other words, it will not be 

 necessary to test each lot of bordeaux mixture made from the 

 stock preparation, provided the first lot is perfect, and no 

 change is made in the quantities of the material used. Special 

 care should be taken to see that the lime milk is stirred 

 thoroughly each time before applying. As a final precaution, 

 it will be well to keep both the stock copper sulphate and 

 the stock lime tightly covered. 



PARIS GREEN SPRAY ARSENITE OF LIME SPRAY. 



These sprays are used for codling moth larvjr, tingis, cater- 

 pillars, slugs, and all eating or biting insects. 



PARIS GREEN SPRAY. 



Proportions for first application — 



Paris green, four ounces. 



Lime, two pounds. 



Water, forty gallons. 

 Proportions for later applications — 



Paris green, four ounces. 



Lime, one pound. 



Water, fifty gallons. 



Directions — Slack the lime ; make a paste of the paris 

 green, mix thoroughly, and then add water to make the re- 

 quired amount ; stir thoroughly while using, and should be 

 thrown on the leaves and fruit in a fine spray. 



Paris green is one of our commercial articles which is 

 shamefully adulterated. The foregoing formula is based upon 

 pure paris green ; it is, therefore, of much importance that 

 one be able to detect impurities. So far as we know but two 

 adulterants are used — gypsum and Glauber's salts. The 

 method generally given for the detection of adulteration is to 



