Evening star. [volume] (Washington, D.C.) 1854-1972, 1929-09-29

tect the milk. which is thus exposed to the air
and considerable effort is necessary in keepinz
the water iced when spring water of yerv low
temperatures is lacking
HE storage vacuum tank in the milk room
IN use at the Beltsville farm is double
Shelled tank Between the inner and outer
shell cooling medium brine or some other
liquid used in mechanical refrigerators is cir
culated, while the milk is being drawn in.
WITHIN the inner tank propeller type of aei-
tator keeps the milk stirred up and hastens the
cooling process
AS the tank is in a vacuum with the pump at
all times eXhausting the system any odors
Such as might be in the milk from ensilage or
other feed which the COW has eaten are taken
out to large extent.
Samples of each cows milk for the butter fat
test are taken from the glass tank in the milk
room. AT present this is done by drawing off a
small quantity from the glass tank by means
of small valve
The milk having reached the vacuum tank
only the cleaning of the system is left to COM
plete the operation. The present arduous
washing. @rinsing and sterilizing of pals.
strainer cloths and other equipment is one of
the tedious and unpleasant tasks of the dairy
man, as 1t Is sort of anti-climax a doing of
the dishes after dinner
The vacuum system cleaning requires not
over two or three minutes Of the farmers time.
The teat cups are detached and placed in a
disnfectant solution and then the pipe in the
milk house is detached from the large vacuum
tank and hooked up to a water and steam line
Cold water Is flushed through the entire sys-
tenn, glass tank and ALL and finally runs out in
the gutter Of the milking house. After q thor
ough rinsing with cold water, steam is turned
into the water to heat it and q hot water rims.
ing follows. The water is then shut of and the
steam itself forced through until the pipes are
thoroughly heated and sterilized. 80 -.
Once o week the pipe lines are taken down
and brushed out by hand At the experimental
farm however in a test the pipes were allowed
to stay up five weeks before being taken down
and then found to be only slightly diScolored
from the calcium in the water. There was abb
solutely no trace of grease in the pipes
In order to make doubly sure Of the Steriliza-
ton OF the pipes, 1t is possible to steam them
again just before milking starts r,..
The vacuum tank in the milk house not only
serves as a cooling tank, but can, II desired. be
used as pasteurizer The milk drawn from
the COW Is at body temperature and 1t would
require only the circulation Of warm water
through the hollow space between the two tanks
to bring the milk to the required 142 degrees
at which the milk is held for half an hour.
The chilling operation would follow Of course,
could be pumped out the dead air space re-
naming serving as an insulator to keep the
milk cold.
After the milk has been cooled In the large
tank, the farmers part is DONE, What happens
from that time on depends upon which direc-
ton the development Of the remainder Of the
process takes at the hands Of the milk dealers.
ONE course can easily be the establishment Of
routes over which tank trucks equipped
with both . vacuum pump to keep the air from
the tank and refrieeratng pump to provide
the necessary refrigeration II the haul Is to be
a long one. The trucks can drive up to the
farmers milk house. tap ON to his tank and
draw out his supply.
When the route has been covered and the
load taken on, the truck can be returned to Q
milk plant where the milk can be pasteurized
or not aS the shipper desires and the milk then
loaded into vacuum tank cars for the journey
to the city to which the milk Is being shipped.
Arriving at the city. the milk can be drawn
into the bottling plant from the siding or into
other tank trucks If the plant is not located at
the siding. The necessary equipment for this
process IS already developed and on the market
although the use is far from being general as
yet
Another system and the one which DIR.
Graves Is more inclined to foresee is the bot
Ting of the milk in the country. In this sys-
tenn. 50-gallon tanks would be supplied to the
farmer by the milk dealer. These tanks dou-
ble-shelled as already described, would have re-
frigerating coil in the interior Of the inner
tank with the necessary propeller for agitation.
farmer would be supplied with one or more
of these tanks depending upon his output Of
milk With the arrival of the truck collecting
for the milk plant the process would vary.
chain hoist would be provided to lift the tanks
ahnoP until for loco no ctr
the 10-gallon cans now in use. The truck coll
Letting the filled tanks would leave empties for
the next day and then return to the plant
4