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 limewater 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 as 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 Baumé hydrometer as a measure of strength, are as 
follows: 
In Decrees Baumé NUMBER OF GALLONS 
ReapiInGc oF HyDROMETER oF WaTER TO ONE GaL- 
LON OF CONCENTRATE 
35 45 
34 434 
33 4ii 
9) 40 
31 374 
30 36} 
‘ Q41 
29 ee 
28 ary 
27 31 
26 293 
9: O73 
25 27 tt 
24+ 26 
23 244 
2) 293 
941 
21 215 
20 193 
19 18t 
18 17 
17 16 
16 15 
15 14 
