PRUNE AND CHERRY BROWN-ROT IN THE NORTHWEST. 19 
a definite quantity of stone lime (it should be at least 90 per cent 
pure) in a measured quantity of water. A smoother paste and a 
better spray mixture will be obtained if the slaking is begun with 
hot water, and this is often necessary where the poorer grades of 
lime are used. If hot water is employed there is also less danger of 
drowning the lime. If cold water is used the action should be 
started by adding only enough water to cover the lime. As the lime 
begins to slake it takes up water, and more must be added, it being 
stirred until a paste is formed, when the remaining quantity of 
water may be added. in 
If 50 pounds of lime is used it is convenient to dilute this to 50: 
gallons with water to make the stock solution, 1 gallon of which 
is then equal to 1 pound of lime. After preparation the barrels 
should be covered if the material is not to be used at once, in order 
to prevent evaporation. 
One point to be kept in mind in preparing Bordeaux mixture 
is that strong stock solutions should never be mixed together. The 
required amount of either stock solution may be added to the spray 
ook, 2 ea) pe ORCHARD = PERCENTAGE 0 BRON LOT 
waterrunin, the a8l- 7yeegryeyT AATEC AOLLINE 400 SHIPPINE 
tator started, and the | 
other stock solution OMA OP EECA eae 
then added. If the 
strong copper-sul- SSRAVYED 
phate stock solution 
aeaeded first, ibis, “|e ee 2aee 
possible to remove the 
coarse particles of UNSPRIVYED 
lime from the stock 
solution of this mate- 
rial by washing it Fic. 14.—Development of brown-rot on harvested cherries 
thr ou i h th e sieve us ane baer Macnee. application (about three 
while filling the tank. 
The spray tank and pump should be thoroughly washed with clean 
water after Bordeaux mixture has been used. 
LIME-SULPHUR SOLUTION. 
Commercial preparations of lime-sulphur solution are usually 
readily obtainable on the market and have largely superseded the 
homemade product The commercial material is reasonable in price 
as a rule, more uniform in strength than the homemade, and spray- 
ing operations are simplified by its use, since all that is necessary to 
prepare the spray is to dilute the commercial concentrate with the 
required quantity of water. 
ROSIN-FISHOIL SOAP. 
Rosin-fishoil soap may be made up as follows: 
1S TAS Ra RAR ZG LA RS ee he Se 5 pounds. 
Potash lye, such as is sold for washing purposes_______ 1 pound. 
I pLT ea Tee A UO Pee oe re. Dial ee ie i 1 pint. 
TE ITE) Ses gh gS RR IESE A A i hel Se 5 gallons. 
The rosin is dissolved in the oil by heating in a large kettle. After 
this has partially cooled, the potash is added, the mixture being 
slowly stirred and carefully watched to prevent its boiling over. 
