44 The Horticulturist' s Rule-Book. 



Sulphide of soda wash, continued. 



thoroughly. Then boil 3 pounds of American concentrated 

 lye with 6 pounds of sulphur and 2 gallons of water. When 

 thoroughly dissolved, it is a dark brown liquid, chemically 

 called sulphide of soda. Mix the two — the soap and the sul- 

 phur — well, and allow them to boil for half an hour, then add 

 90 gallons of water to the mixture, and it is ready for use. 

 Apply it warm by means of a spray-pump. Used warm, its 

 effect is better and less material is required than when cold- 

 For scab diseases. 



Sulphur. — In its dry and pulverized state, sulphur, known as 

 flowers of sulphur, is often a valuable fungicide, particu- 

 larly for surface-mildew. In the greenhouse it may also be 

 used in fumes. Evaporate it over a steady heat, as an oil- 

 stove, until the house is filled with the vapor. It should 

 never be heated to the burning point, as burning sulphur 

 quickly destroys most plants. It may also be used in water, 

 in the proportion of an ounce of sulphur to 5 gallons of 

 water. 



Sulphur and lime. — A mixture of sulphur and lime in equal parts 

 by weight. For anthracnose during gro wing-season. 

 Some fungicides may be added to London-purple or Paris- 

 green mixtures, as explained on page 8. 



The best spraying machine is the one 

 which throws the finest spray to the 

 greatest distance. 



