168 The Spraying of Plants. 



barrel holding 50 gallons, and stir well. Allow the mixture to 

 stand about two hours, when the barrel may be slowly filled 

 with warm water, the contents being continually stirred as the 

 water is added. One pint of the preparation may be used in a 

 gallon of warm water. For use in summer. 



Resin 20 pounds. 



Caustic soda 8 " 



Fish-oil 1 gallon. 



Water to make 100 gallons. 



The caustic soda is first dissolved in about 10 gallons of 

 water, after which half of the solution is taken out and the 

 resin added to that remaining in the kettle. When all the 

 resin is dissolved, the fish-oil is added to it, and the whole 

 thoroughly stirred, after which the balance of the caustic soda 

 solution is added very slowly and boiled for about an hour, or 

 until it will readily mix with water. Use an iron kettle. For 

 use in summer. 



Resin 17 pounds. 



Soda (HO per cent) 7 " 



Fish-oil 3 " 



Petroleum 2 " 



Water 100 gallons. 



Boil the first three ingredients together for four hours in 20 

 gallons of water, after which the petroleum should be poured in, 

 the whole being well stirred. The 80 gallons of water may then 

 be added, and an emulsion made by active agitation. For use 

 in summer. 



Resin 8 pounds. 



Caustic soda 1 pound. 



Water to make 22 gallons. 



Dissolve the caustic soda in about 1 gallon of water. When 

 dissolved half the solution is taken out, and the resin added to 

 the remainder and boiled until dissolved, after which the bal- 

 ance of the soda solution is added very slowly. The mixture is 

 then boiled over a hot fire, being stirred almost constantly ; and 

 when cooked sufficiently it will assimilate with cold water like 

 milk, which it much resembles. Dilute as above, and apply 

 during summer. 



