72 INSECTICIDES FOR SUCKING INSECTS 
Place in the main boiler 50 pounds of stone lime. Add 20 gallons 
of hot water. While the lime is slaking add 100 pounds of sulphur. 
Stir the mixture thoroughly and constantly, adding more water from 
time to time. When the lime is slaked, add hot water to make 70 
gallons. Boil this slowly for one half to three quarters of an hour, or 
until all of the sulphur and lime are dissolved. Dip out small quanti- 
ties and test from time to time. As the material boils away, add hot 
water to keep the volume up to 70 gallons. When the materials are 
all dissolved, pour out into barrels, straining carefully, and allow to 
cool. At once close up as nearly air tight as possible. 
To dilute for use as a winter spray, take 1 gallon of the concentrate 
to 5 gallons of water. Or, better, have a Baumé hydrometer, test 
the specific gravity of the concentrate, and dilute with water according 
to the following table: 
Reapivc on HrpRoMETER IN DEGREES NUMBER OF GaLLons oF WaTER TO 
Bacué One GALLON OF THE CONCENTRATE 
35 
34 
33 
32 
31 
30 
29 
28 
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The above dilutions are for winter strength (the material commonly 
used for San José scale and leaf blister mite). 
