The Guthrie daily leader. [volume] (Guthrie, Okla.) 1893-1996, 1911-10-18
THE USE OF THE BABcocK TEST
OR MILK TESTING.
Cry Roy c. Potts.)

easy method of determining the pen
cent Of butter fat in milk, cream
skim milk, buttermilll and other dair,
products. Its principal use on th,
farm is in testing the richness OF the
milk produced by the cows in tn,
dairy herd; also OF the cream pro
duccd and sold. BY its use the dairy
farmer is able to measure the pro
dnctlon Of butter fat Of his indlyld
nal COWS; also determine the pounds
# butter fat in tho milk or cream
sold from his farm. Many breeder,
If pure bred dairy cattle. viz: Jer
,ey, Guernsey, Holstein, Freisian auo
ayrshire have recognized the value o.
he BabCock test in measuring The
production or their dairy cows and are
making Official and authenticated
records of butter fat produced. THESE
lairymen and breeders Of dairy eattlr
With thesc records. can intcligenth
md without mistake "wocd out" Tho
poor, Improbable COWS. select tn,
ires for thcil herds from the largt
reducing dams and in that way RAJ
dly Improve the production OF tn,
lairy herd.
The following directions for test
ng milk, II carefully followed vii
live accurate results
l. Thoroughly mix the sample Il
oe tested by pouring from one yesse
nto another and back and forth soy
,ral times.
2. Immediately after mixing, IN
iert the pipette into the milk anC
'uck until the milk has risen above
he mark on the pipctte Thei
luickly place the forefinger or thuml
)yer the top OF the pipette and allow
the milk to run down slowly by re
ievng the pressure Of the finger.
3. Empty the milk from the pipett'
nto the test bottle by holding tn,
bottle at an angle and the lower en-
II the pipette against the inside O
the bottle just below the top. tThi'
precaution is taken to prevent any ali
bubbles from forming across the necl
Of the bottle, thus forcing the mill
lver the outsideO
4. Add the acid, IT'S c. c., witt
The acid measure, holding the bottlt
n the same manner as when the mill
vas carefully emptied into the bottl'
With the pipette.
S. The acid is then gently mixec
With the milk by giving the bottle {
slow, rotary motion with the wrist.
6. Allow the mixture to stand :
ew minutes
7. Shake or mix again and thel
place the bottles in the tester.
8. Run the tester at proper speed
for four minutes.
8. Add moderately hot water unit
contents comes to base Of the neck OF
the bottle.
10. Whirl again for two minutes.
II. Add moderately hot water un
til contents OF the bottle is within one
inch of the top of the bottle.
12, Whirl for one minute
13. Read the test Immediately.
Precautions in Making Test.
I. BE sure you have a fair sample.
9. The temperature OF the milk
should be so degrees or 20 degrees f
2. Always mix twice after acid has
been added.
4. BE sure the tester runs at the
proper speed.
s. Use nothing bnt clean, soft wa
ter in filling the bottles.
G. BE sure that the acid is OF the
right strength.
7. Be sure that tho tester does not
jar.
8. Mix thoroughly as soon as the
acid is added to the milk.
.. DO not allow the bottles to be
come cold before reading
10. Read the test twice to Insure .
correct reading.
Cream Testing.
In testing cream, an is C. c. sample
is used. Properly, the cream sample
should be weighed, using is grams
but approximate results arc obtained
when rs c. c. is used This particu-
larIy Is true with cream testing 80
per cent or less.
The fat column should be read OF
measured from the bottom OF the
curved cavity at the top OF the raj
column to the extreme bottom of the
TAT column. Gig. 3-c) In other par
,iculars cream is tested exactly as Is
milk.
Testing Skim Mix and 5u.termllS.
In testing skim milk and butter
milk a doube-necked test bottle Is
used. The sampling and testing is
done the same way as with whole
milk. The milk and acid are added
through the side neck which extends
nearly to the bottom OF the bottle.
The Babcock testers adapted for
use in the schoolroom or on the farm
usually require a test bottle six
inches in length.
The neck of the regular milk test
bottle is marked with q graduated
scale, the smallest division Of which
equals 2 OF per cent. Five OF these
divisions equal ! per cent The bot
tie is graduated to read from zero to
or 10 per cent.
Cream test bottles are not always
graduated the same Some bottles
are graduated from zero to 30 per
cent with the smallest graduation
equal to one-half of | per cent. Others
are graduated from zero to 50 per
cent with the smallest graduation
equal to ] per cent Another cream
bottle Is designed for a half sample
q grams) or g. c., and is graduated
from zero to so per cent with the
smallest graduation equal to s Of
per cent. and the graduations so made
hat the correct test Is obtained BY
the graduation directly This
.t..ln i.nllin In La ,tand r.ifh ~,