Sprays and Spraying. 59 



them can safely be used for summer spraying is yet to be 

 demonstrated. 



The chief fault to be found with these commercial prepara- 

 tions is that they cost too much. The retail price is $9.00 

 to $12 per barrel of 50 gallons. The lime and sulphur neces- 

 sary to prepare 50 gallons of stock Solution which is equally 

 as efficient costs at present retail prices approximately $3.00. 

 It may be prepared as f ollows : 



Sulphur (best finely ground) one sack.. ..110 pounds 



Lime (best grade, unslaked) 55 pounds 



Water, sufficient to make 60 gallons 



Slake the lime, mix the sulphur into a thin paste with a 

 little water, add it to the lime, add sufficient water to make 

 60 gallons, bring to a boil and boil vigorously for 30 to 45 

 minutes. The sediment is then allowed to settle, after which 

 the clear dark amber-colored liquid is drawn off and may be 

 stored in sasks for future use. 



Every grower who expects to prepare his own spray by the 

 stock Solution should provide himself with a Beaume's Acid 

 Scale Hydrometer. Such an instrument, which should not 

 cost over $1.00, furnishes a very simple and convenient rnethod 

 of testing the strength of the Solution. A "stock" Solution 

 prepared as above described should test approximately 30 

 degrees upon such a scale. 



If the grower be provided with a hydrometer, it is not at all 

 necessary to obtain stock Solutions of uniform strength. The 

 following table gives the proper dilutions to be used with 

 stock Solutions of various degrees of density, both for winter 

 and summer spraying: 



