SUMMER STRENGTH LIME SULPHUR 87 



ture. If this is done, allowance must be made for the volume of the 

 arsenate of lead solution when filling up the barrel of hmewater to 

 the requisite 25 gallons. 



A ready prepared Bordeaux paste containing arsenate of lead is on 

 sale in stores. 



Summer Strength Lime Sulphur 



Summer strength lime sulphur is now coming into use a« a fungi- 

 cide for the control of certain diseases. While this is similar, chemi- 

 cally, to the lime-sulphur wash used as a winter spray for scale insects, 

 it is much weaker. It is prepared by proper dilution of the com- 

 mercial concentrated solutions, or by a so-called " self-boiled " method, 

 in which the chemical composition is somewhat different. The proper 

 dilutions of lime-sulphur concentrate for summer spraying of apples, 

 making use of the Baume hydrometer as a measure of strength, are as 

 follows : 



In Degrees Baum£ Number of Gallons 



Reading of Hydrometer of Water to One Gal- 



lon OF Concentrate 



35 45 



34 43i 



32 40 



31 37i 



30 36i 



29 341 



28 • 32f 



27 31 



26 29i 



25 271 



24 . 26 



23 24i 



22 22f 



21 2U 



20 19f 



19 18i 



18 17 



15 14 



14 121 



