The Evening statesman. [volume] (Walla Walla, Wash.) 1903-1910, 1907-04-30
OF { MILkMAN IS STILL
Continued from Page One.)

specific gravity is just great enough so
that it will float if the milk contains
the required per cent Of solid sub
stance. If the ball sinks to the bot
tom of the instrument when it is full
of the liquid the dairyman belongs to
the old fashioned water fraud va
riety.
The test for butter fat is one of the
most complicated of all. A peculiar
shaped flask is used which looms like
a cross between a clock pendulum and
q potato masher. 1t has marks all
along the sides which register cubic
centimeters.
Into the bottom of this flask. shaped
like a pear, with an elongated stem, is
placed exactly 17.6 c. C. of the milk
from the dairyman's bottle and an
equal amount of strong sulphuric
acid. with a specific gravity of 1900
to 1920, is put in with it.
Now the pendulum potato masher is
going to have a ride on the tiniest and
fastest merygOrOund imaginable.
1t is known as the BabcOck centrifu-
gal machine. The flask is set in one
of the little circle of buckets around
the wheel and when the crank is turned
the flask swings around the circle 1900
times every minute.
When this has been kept up for five
minutes the sulphuric acid atoms have
united with every thing in the milk
except the butter fat. There is
chemical feud of ages standing between
the acid and the fat and even the mer-
ry-gO-round ride of $4,000 swings will
not make them come on speaking
terms
The flask is now filled with hot
water and set to whirling again for
14,4OO whirs. The heat in the water
drives all the butter fat to the top of
the neck of the pear-shaped flash
where it is lined up against the gradu-
ate on the side to be measured. If it
is 3 per cent of the total contents, al
lowing for the acid and water put in.
well and good. The cows of the dairy
man must be normal and healthy.
The simplest formaldehyde test is
what is called the phoroglucin test. one
gm of this substance is mixed with
100 &C. of distilled water. Five &C. OF
this solution is put in a tesr tube and
on top of it is poured 10 &C. of the mix
from the milllman's bottle. decided
red color shows at once at the point
of contact if there is as much formal
dehyde as one part in 10000 i'll the
milk.
Another more common test to make
IA mixture of two drops of tincture OF
chloride of iron, L. s. p, For, with II
&C. Of suiphuric acid. Pour this in
testube. Then pour an equal amount
of the milk on top. If there is a violet
color at the point of contact. the pois-
onous formaldehyde is present.
The other most common preservatlVc
according to DR.. Braden, are sodium
carbonate, bOric acid and salicyilc
acid. All are forbidden by law and
each one has u particular test which
will reveal their presence with certain
ty.
There is but one proper preventative
for milk" said DR.. Braden. land that
is crushed ice around the receptacle.
There is but one man here Who uses
that now. He is Kendall of the Sha-
dy Nook dairy near College Place. he
is really deserving of mention because
he takes so much pains to have every
thing about his place conducted in the
most sanitary way. In my opinion his
system is as nearly ideal as it is pos
sible to conduct a dairy. He deserves
praise for his efforts in this direction.