Division 5.2

Mix the sample thoroughly by careful inversion to avoid inclusion of air. Pour the milk into the cylinder (4.2.), held inclined so as to avoid the formation of foam or of bubbles. Use sufficient milk sample to ensure that some will overflow from the cylinder when the hydrometer (4.1.) is placed in it. Carefully lower the hydrometer into the milk and allow to float freely when it reaches its balance position. The cylinder is to be placed vertical. The hydrometer must be positioned in the middle of the liquid column and should not touch the sides of the cylinder.