Lactometer

Lactometer, or GALACTOMETER, a very simple instrument for testing the richness of milk ; it consists of a glass tube graduated to 100 parts. New milk is poured in up to the top of the graduated part and allowed to stand ; and when the cream has completely separated the value of its quantity is shown by the number of parts in the 100 which it occupies. Another form of instrument was invented by Doeffel, consisting of a small hydrometer with a scale 2 inches long divided into 20 degrees, the zero being placed at the point to which the instrument sinks in water, and the 20th degree corresponding with the density 1.0383. This instrument is preferred by the continental chemists ; and $14^\{\backslash circ\}$ is held to show milk undiluted with water.