The Glenwood post., 1912-08-24

The sulphate of copper and lime
must be brought together in very d.
Lutte solutions for the best Bordeaux
mixture. The sulphate of copper re-
qures a considerable time to dis
solve in water, and considerable time
Is required for Stacking lime. For
these reasons it is best to have mix
Ing plant for making Bordeaux mix
ture. This mixing plant should con-
sist of a stock solution tank in which
enough sulphate of copper may be dis
solved to last through one spraying, If
not through several. The sulphate of
copper is usually dissolved in water
at the rate of one pound to the gal
on, so it is only necessary to dip
rom the stock solution tank one gal
on in order to get one pound of sui.
1hate of copper. Then there is nee
assary for the lime an elevated slak-
ng box in which the lime may be
slaked and drawn down into a stock
solution tank In this case, also, one
pound of lime should be dissolved in
1 gallon of water. The lime oil
course should be weighed before this
slaking. Two dilution tanks, such as
s shown in the figure, are also neces'
sary, one for sulphate of copper and
The other for lime. In these tanks
The substances are diluted before they
are run together into a mixing tank
or the spray tank. All of these
.anks should be on an elevated plat
'orm so that the liquid can be run out
Of them into the spray tank below.
Where water pressure is not available
an elevated water tank is needed to
supply water to these stock solution
tanks, or in some cases good pump
run by a gasoline engine may take
The place of the elevated water tank.
In this case the water would be
pumped direct from pond or well
into the stock solution tanks and the
lilution tanks. A good strainer is an
essential part of the equipment. There
are various types of strainers, but
probably one like that shown in the
figure where the strainer comes to-
gether in the center making four
slanting surfaces through which the
liquid can run is the most desirable
y
settle down toward the bottom, leav
ng plenty of straining surface about
It.
The process of making Bordeaux
mixture with plant like this would
hem as follows: First in making
The sulphate of copper stock solution
assuming that the tank holds 100 gal
Ions, the tank should be filled nearly
full of water then 100 pounds of the
sulphate of copper should be weighed
out and placed in a gunny sack or
some other porous material and sus
pended just in the top of the liquid.
If it is poured into the bottom of the
barrel it will be some months before
it would all be dissolved unless hot
water is used. Then assuming that
the lime stock solution barrel holds
100 gallons, we should weigh out 100
pounds of good stone lime, slake 1t in
the elevated shaking box and draw it
out, usually through a strainer. into
the lime stock solution tank and fill
the tank up to 100 gallons.
Now suppose it is desired to make
200 gallons of Bordeaux mixture at
strength of 4:40:5O. After stirring.
16 gallons of the sulphate of copper
stock solution should be dipped into
the sulphate of copper dilution tank
and this tank filled up to 100 gallons.
Then the lime stock solution barrel
should be stirred thoroughly and 16
gallon dipped from it into the lime
dilution tank. Then the contents of
these dilution tanks should be run
through a strainer into a. separate
mixing tank or directly into the spray
tank.
If 1t is desired to make only 100
gallons of the mixture, one-half of
these quantities should be used in all
cases, or if it is desired to make only
so gallons of the mixture, one-fourth
Of these quantities should be used.