44 The Horticulturisf s Rule-Book. 



Sulphide of soda wash, continued. 



thoroughl5\ 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 

 quicklj^ destroys most plants. It may also b3 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 growing-season. 

 Some fungicides may be added to London-pui-ple or Paris- 

 green mixtures, as explained on page 8. 



V)e best spraying machine is the one 

 which throws the finest spray to the 

 greatest distance. 



