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FOOD & DRUGS ACTS. 1938 — 1950.
MILK (SPECIAL DESIGNATION) (PASTEURISED & STERILISED MILK)
REGULATIONS. 1949/1950.
MILK (SPECIAL DESIGNATION)(RAM MILK) REGULATIONS 1949/1950.
BACTERIOLOGICAL EXAMINATION OF MILK.
The tests prescribed for Pasteurised Milk are:—
(a) The Phosphatase test for efficient heat—treatment which
is satisfied by milk which gives a reading 2.3 Lovibond
Blue units or less, and
(b) The Methylene Blue test for keeping quality which is satisfied
by milk which fails to decolourise Methylene Blue
in thirty minutes.
The Turbidity test is prescribed for Sterilised Milk, the presence
of any signs of turbidity indicating that the milk has not been heated
to sterilisation temperature.
During 1951, one hundred and twenty—five samples of milk were purchased
by the Sampling Officer and submitted for the appropriate tests.
Of these, forty—two were taken at the early morning delivery to the
hospitals in the Borough and twenty—one were taken at schools under the
control of the London County Council.