158 The Spraying of Plants. 



orchards as well as on the sheep. It is used against insects and 

 fungi. 



Lime (unslaked) 25-40 pounds. 



Salt 15 



Sulphur 20 



Water 60 gallons. 



To mix the above, take 10 pounds of lime, 20 pounds of sul- 

 phur, and 20 gallons of water. Boil until the sulphur is thor- 

 oughly dissolved. Take the remainder 15 pounds of lime and 

 15 pounds of salt slake and add enough of water to make the 

 whole 60 gallons. Strain, and spray on the trees when milk- 

 warm, or somewhat warmer. This can be applied when the 

 foliage is off the tree, and will have no injurious effects on the 

 fruit-buds or on the tree itself. 



LIME SULPHIDE ; SULPHIDE OF LIME ; CAS. This sub- 

 stance is made by boiling together sulphur and quicklime, using 

 equal parts of each, until the liquid assumes a reddish yellow 

 color. Even twice the amount of sulphur may be used with 

 the above quantity of lime, and an excellent article will still be 

 produced. Lime sulphide is of a white color, the compound 

 being CaS. As the boiling is continued, a yellow color appears, 

 caused by the formation of the bisulphide of lime, CaS 2 . Upon 

 prolonged boiling the yellow is replaced by an orange-red, which 

 is the color of a third compound, the pentasulphide of lime, 

 CaS 5 . This is particularly rich in sulphur. The most popu- 

 lar method of using lime sulphide is described under GRISON 

 LIQUID, which see. The compound is not a very energetic 

 fungicide, but is valuable in treating surface mildews, such as 

 the oidium of the grape. It is also of value in controlling 

 mildew upon plants grown under glass, such as the peach, cu- 

 cumber, rose, etc. With few exceptions, however, the copper 

 compounds are to be preferred. 



LINSEED OIL EMULSION. This remedy has been recom- 

 mended by S. T. Maynard for the destruction of the San Jose 

 scale insect, it having proved to be very efficient in controlling 

 various scale insects found upon cacti, English ivy, rose, apple, 

 pear, ash, thorn, and willow. 



Hard soap I pound. 



Boiling water, enough to dissolve the soap. 

 Linseed oil 1 gallon. 



