London's Pulse: Medical Officer of Health reports 1848-1972

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Greenwich 1961

[Report of the Medical Officer of Health for Greenwich Borough]

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118
relation to the sale of milk is prohibited under the above Regulations
unless the distributor is licensed for the use of same.
With the coming into force of the new Regulations, the granting
of Supplementary Licences (issued to firms who sold within the
Borough but whose premises were outside) has been discontinued
and, in accordance with these Regulations, licences (which previously
were annually renewed) have a fixed five year period at
the end of which they become renewable for a further five years.
No milk processing plants are located in the Borough and all
licences granted were in relation to milk obtained in pre-packed
form for sale to the general public. The following licences had
been granted and were in force on the 31st December, 1961 :—
Licences In Operation
issued 31.12.61.
Distribution of Sterilised Milk 19 91
Pasteurised Milk 14 63
Tuberculin Tested 8 41
Sampling.—Under provisions of the Third Schedule to the
above-mentioned Regulations, Methylene Blue and Phosphatase
tests are prescribed, the former for assessing the "keeping" qualities
of milk, and the latter for estimating the efficiency of pasteurisation.
In addition, a Turbidity test is also prescribed for ascertaining the
effectiveness of the heat treatment of Sterilised milk and, with
regard to Tuberculin Tested Milk, the new Regulations have introduced
a further test—the clot-on-boiling test.
During the year, 30 samples of milk consisting of 21 Pasteurised
milks, 3 Sterilised and 6 T.T. Pasteurised were examined in accordance
with the prescribed tests. Of these, 2 samples of Pasteurised
and one of T.T. Pasteurised milk failed the Methylene Blue tests
but the results were declared void by reason of the permissible
atmospheric shade temperature being exceeded. The remainder of
the samples proved to be satisfactory with the exception of one
of Pasteurised milk taken from a milk machine. This failed the
Methylene Blue test but investigations revealed that this was probably
the result of faulty loading.
Analytical Examination of Milk.—All designated milks being
sold in the Borough were sampled, including those of the superfatted
variety, viz., Channel Island, Jersey, South Devon, etc. A
total of 24 formal samples and 1 informal were submitted to chemical
analysis and all proved to be genuine.
Four samples of cream were sampled and found to be genuine.