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Schoenman, Adolph / Milk testing : instructions for testing milk and dividing money for creameries, cheese factories and dairymen
(1894)

Chapter V. How to detect watered milk,   pp. 23-27 PDF (975.8 KB)


Page 24


24               MILK TESTING.
  Send to some dairy supply house for a
Quevenne Lactometer, and a glass tube about  ,
two inches in diameter and ten inches high :
(or a tin cylinder of that size is sometimes l
used). Take a sample of the milk you wish
to test, mix it well, and pour it into the tube
to within three inches of the top. Then in-  tv
sert the Lactometer carefully, and pour in
enough milk to fill to the top.
  Observe the division of the scale which
corresponds with the surface of the milk for
the lactometer reading.
  Find the temperature of the milk, as the
correct lactometer reading is only obtained
at 6o0 F. A lactometer with a thermometer  -
attached is best. Where the two instru-
ments are combined the thermometer scale
should be above the lactometer scale so that
both readings may be taken without remov-
ing the lactometer from the milk. If the
temperature should not be just 600 the lac-
tometer reading may be corrected by the
following rule.
  33. Rule for Correcting the Quevenne
Lactometer Reading.-Within the range
between 50° and 700.
  First.-If the T. is above 600 add one-
tenth to the L. R. for every degree it is
above 6o0.
  Second.-If the T. is below 600 subtract
one-tenth from the L. R. for every degree
it is below 60°.                          LACTOQETER.
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