Lactoscope

Definitions

  • Webster's Revised Unabridged Dictionary
    • n Lactoscope An instrument for estimating the amount of cream contained in milk by ascertaining its relative opacity.
    • ***
Century Dictionary and Cyclopedia
    • n lactoscope An instrument for testing the quality and richness of samples of milk, by their comparative opacity, constructed and operated upon the principle that the richer the milk is in fatty and caseous substances the greater will be its resistance to the passage of light through a stratum of any given thickness. The samples are tested by a light of equal intensity, usually the flame of a stearin candle. A common form of lactoscope may be described as a box with two vertical parallel and polished glass sides, one of which may be moved by a screw toward or away from, and always in parallel relation with, the other. The candle is placed at a specifled distance from the fixed glass side of the box, and as the movable side recedes the stratum of milk increases in thickness to a point at which the candle-flame becomes invisible through it. The various thicknesses at which this occurs indifferent samples are indications of the richness of the samples, provided no adulteration other than watering has been attempted. There are also lactoscopes of simpler construction and operation. (Encyc. Brit.)
    • ***
Chambers's Twentieth Century Dictionary
    • Lactoscope an instrument for testing the purity or richness of milk by its degree of translucency
    • ***

Etymology

Webster's Revised Unabridged Dictionary
L. lac, lactis, + scope,
Chambers's Twentieth Century Dictionary
L. lacteus, milky—lac, lactis, milk; Gr. gala, galaktos, milk.