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To Detect Chalk in Milk

Di- . Diany, will settle to the bottom in an hour or two; put to the sediment an acid, vinegar for instance, and if effervescence take place it is chalk. 4378. Το Detect Mineral Substances in Flour. The presence of a mineral adulteration of flour or meal may be readily de- Tests or Reagents. These are tected. A small quantity of the suspected substances employed to determine the flour is shaken up in a glass tube with chloroname or character of any other substance, or form. All mineral adulterations will collect to detect its presence in compounds. They at the bottom, while the flour will float on are used in both the solid and fluid state; the liquid. generally the latter, when they are known as liquid tests. Their application as reagents When flour is genuine or of the best kind, it