The New Student's Reference Work/Lactometer

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Lactom′eter or Galac′tome′ter, a simple instrument used in testing the richness of milk, is graduated into a hundred parts.  Milk is poured in and allowed to stand until the cream has formed, then the depth of the cream deposit in degrees determines the quality of the milk.  Another instrument, invented by Doeffel, is two inches long, divided into 40 parts, beginning at the point to which it sinks when placed in water.  Milk unadulterated is shown at 14°.