CONCENTRATED LIME SULPHUR 71 



with a hydrometer, which will indicate the specific gravity. Procure 

 a hydrometer marked according to the Baume scale, and dilute accord- 

 ing to the table given below in the directions for diluting home-made 

 concentrated lime sulphur, remembering that this is for use on dormant 

 trees only. 



Since this spray material is quite clear, it shows but little on the 

 trees. Some operators, therefore, are following the practice of adding 

 lime to the material after it is diluted ready for the spray tank, in order 

 to make the spray show up. Probably there is no advantage gained 

 in efficiency, but one can tell whether the tree is thoroughly coated. 

 The lime must be added after the material is diluted. Either lump 

 lime or air-slaked lime, at the rate of 6 or 8 pounds to 50 gallons 

 of diluted spray, may be employed. It will require about ten minutes 

 for the lump lime to slake. Care should be taken to arrange matters 

 so that the addition of lime will take place before the final straining. 



Home-made Concentrated Lime Sulphur 



Lump lime 50 pounds 



Sulphur 100 pounds 



Water (hot) 70 gallons 



Dilute as directed. 



If suitable appliances are at hand, it is feasible to make up con- 

 centrated lime sulphur at home, which can be diluted for use when 

 needed. It is absolutely necessary, however, to keep the finished prod- 

 uct sealed up away from contact with air, and it is essential that the 

 purity of the materials used be guaranteed. In most cases, it will be 

 found that the commercial concentrate is safer. 



To prepare the concentrate, have ready two boilers, one of which 

 must be of 100 gallons capacity and is used for boiling the materials, 

 while the other serves to keep ready a supply of boiling water to re- 

 plenish the material as it boils down. It is advisable to have a measur- 

 ing stick, so that the amount of liquid may be ascertained from time to 

 time, and hot water added when needed. It is much better if the cook- 

 ing can be done by steam, in a closed vessel ; but direct fire will do. 



