19 



ARSENIC AND LIME. 



White arsenic pound. . 1 



Lime pounds . . 2 



Water gallons. . 2 



Boil the above ingredients for three-fourths of an hour. For use, 

 dilute b}^ adding 300 to 400 gallons of water. 



Additional lime in the solution may be necessary to prevent burn- 

 ing of the foliage. 



ARSENIC, SODA, AND LIME. 



White arsenic pound . . 1 



Sal-soda crystals pounds. . 4 



Water gallons. . 2 



Boil the above ingredients for fifteen to twenty minutes, when the 

 arsenic should be dissolved, leaving only a little sediment. This stock 

 solution may be kept indefinitely, but should be labeled "poison." 



To prepare the spraying mixture add 1 quart of the stock solution 

 to 40 gallons of water in which 2 pounds of fresh lime has been 

 dissolved. 



Another formula which has been much used by some orchardists, 

 notably, Hon. E. L. Smith, of Hood River, Oreg., is as follows: 



White arsenic pound. . 1 



Sal soda" pounds.. 2 



Water gallons. . 2 



To prepare the spraying mixture, slake 6 to 8 pounds of lime in 50 

 gallons of water. Add to this 1^ pints of the stock solution, stir thor- 

 oughly, and the mixture is ready for use. The results are claimed to 

 be fully equal to those attained with Paris green. 



In employing either of these formulas use great care. The pots and 

 utensils used in preparing the solution should not be employed for 

 other purposes. The arsenic should be plainly labeled, lest it be mis- 

 taken for something else. 



WHALE-OIL SOAP AND QUASSIA. 



Quassia chips pounds. . 8 



Whale-oil soap do 7 



Soak the chips twelve hours in 8 gallons of water. Dissolve the 

 soap in boiling water. Strain the quassia extract to remove the chips 

 and add the soap solution. Stir thoroughly and dilute to make 100 

 gallons. 



"The dry sal soda should be used in this formula. If the crystal sal soda is used 

 some of the arsenic will remain free and may burn the foliage, as 1 pound of arsenic 

 combines with 1.6 pounds of dry sal soda, or 4.4 pounds of the crystal sal soda. If 

 the crystal sal soda is used it should be increased to 4 pounds, or the spraying mix- 

 ture should stand for an hour or two in order to allow the arsenic to combine with 

 the excess of lime. L. 0. H, 



