The searchlight. [volume] (Culbertson, Mont.) 1902-current, 1912-06-21

The sulphate OF copper ana lime
must be brought together in very d.
lutte solutions for the best Bordeaux
mixture. The sulphate Of copper re-
quires a considerable time to dis
solve In water, and considerable time
is required for stacking lime. For
these reasons 1t Is best to have a mix
ing plant for making Bordeaux mix
ture. This mixing plant should con-
sist OF stock solution tank In which
enough sulphate of copper may be dis
solved to last through one spraying, IL
not through several. The sulphate OF
copper is usually dissolved in water
at the rate of one pound to the gal
Ion, so 1t Is only necessary to dip
from the stock solution tank one gal
lon in order to get one pound Of sui
plate of copper. Then there Is nee
essary for the lime an elevated slak-
ing box in which the lime may be
slaked and drawn down into a stock
sol&tion tank. In this case, also. one
pound OF lime should be dissolved In
gallon Of water. The lime OF
course should be weighed before this
shaking. Two dilution tanks, such as
is 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
tanks should be on an elevated plat
form 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 a 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 a pond or well
into the stock solution tanks and the
dilution 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
type. This allows the sediment to
settle down toward the bottom, leav-
ing plenty Of straining surface about
II.
The process OF making Bordeaux
MIXTURE with a plant like this would
them 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.
II 1t Is poured into the bottom OF tho
barrel II will be some months before
1t 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 1t
out. usually through a strainer. into
the lime stock solution tank and MI
the tank up to 100 gallons.
Now suppose II Is desired to make
200 gallons Of Bordeaux mixture at a
strength Of 4:40:50. 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 10 100 gallons.
Then the lime stock solution barrel
should be stirred thoroughly and lS
gallon dipped from Il into the lime
dilution tank. Then the contents of
these dilution tanks should be run
through a strainer into q separate
mixing tank or directly into the spray
tank.
II 1t II desired to make only 100
gallons Of the mixture. one-half Of
these quantities should be used In all
cases. or II 1t IL desired to make only
80 gallons Of the mixture, one-fourth
Of these Quantities should b used.
0l0 Eoo CanHsp