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35
Adulterated Samples.
The following action was taken in regard to the 2 formal samples
certified as adulterated:—
No. 183. Butter, excess of 0.3% water. Cautionary letter.
No. 198. Vinegar, 7% deficient in acetic acid.—Cautionary
letter.
Follow-up action showed no deviation from the standard set.
Bacteriological Examination of Food.
In addition to samples taken for chemical examination, samples
food were submitted for bacteriological examination. In two cases,
in connection with an outbreak of food poisoning, the results were
Positive.
Heat Treated Milk.
Samples of pasteurised and sterilised milk are taken at regular
intervals for submission to the Public Health Laboratory Service for
prescribed tests, and during the year samples as under were taken
with the results set out:—
Phosphatase Methylene Blue
Satisfactory Failed Satisfactory Failed
Pasteurised 33 — 33 —
Turbidity
Satisfactory Failed
Sterilised 31 —
Monthly returns of the samples taken, and of the results of the
examinations, are sent to the Milk Division of the Ministry of
Agriculture, Fisheries and Food, and they are at once notified of
any adverse report.
Milk supplied in Schools and Hospitals.
Samples of milk in course of delivery to Schools and Hospitals
in the Borough are regularly taken, both for chemical analysis and
,for submission to the prescribed tests for such milk. The samples
are included in the general totals given on pages 32, 33 and 35.
the results of the analyses and tests are communicated to the London
County Council or to the appropriate Hospital Management Com-
mittee.
Ice-Cream.
Thirty-six samples of ice-cream were taken during the year,
each sample being submitted to the methylene blue test.
The samples were, as a result of the test, placed in the following
grades:-
Provisional Grade 1 17
„ 2 14
„ 3 4
„ 4 1
36
Where samples of ice-cream made at premises in the Borough
receive unsatisfactory reports, the premises, plant, and methods of
operation are examined, and, where possible, improvements are
suggested.