466 STATE BOARD OF AGRICULTURE. 



Formula for white arsenic and lime mixture: 



White arsenic 1 pound 



Lime 10 " 



Water 400 gallons 



In preparing the lime and arsenic mixture, add two pounds of lime 

 and one pound of white arsenic, to two gallons of hot water, and boil it 

 for at least thirty minutes. This should be added to 400 gallons of 

 water, and eight pounds of lime additional used. Care should be takeD 

 to have the lime freshly slaked. We have used this preparation for 

 several years and find it can be used without injuring the foliage, and 

 that it is as effective as twice the quantity of Paris green. 



Sal soda is sometimes used to dissolve the arsenic, but it generally 

 adds at least fifty per cent to the cost of the preparation and makes it 

 nearly, if not quite, as expensive as Paris green. W r ith a little extra 

 labor in boiling, the mixture of lime and arsenic alone will be as effectual 

 and fully as safe. For those who care to use the sal soda, the following 

 formula is given: 



Arsenic 1 pound 



Sal soda 2 " 



Water 2 gallons 



Boil until the arsenic is dissolved. The above solution added to ten 

 pounds of lime will be sufficient for 400 gallons of spraying mixture. 

 The solution can be kept for any length of time and can be prepared for 

 use as needed. If only fifty gallons are to be used at once, one pint of the 

 solution and two pounds of lime only will be required. 



THE ADULTERATION OF PARIS GREEN. 



Many of the failures with the use of Paris green have been 

 ascribed to its adulteration, and this will undoubtedly account for a 

 large number of them. While it is not always infallible, any one can 

 test Paris green by adding ammonia water to a small amount, and if 

 pure it will all dissolve, forming a clear, blue liquid. lu case, as will 

 often happen, if adulteration has been practiced, a mass of white material 

 remains undissolved, the amount compared with the quantity of Paris 

 green used for the test will show the amount of the adulteration. 



WHITE HELLEBORE. 



Although Paris green will give as good or better results, many per- 

 sons use hellebore upon currant and gooseberry bushes, cabbages, etc. 

 The following formula will give good results: 



White hellebore 1 oz. 



Water 5 gallons 



Care should be taken not to use this upon ripe fruit, as hellebore is a 

 poison. 



