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three months, and any animals showing evidence of any disease which
may injuriously affect the milk must be immediately removed from the
herd, and reported to the Licensing Authority. When bottled, the cap
must bear the name of the bottler and the date of production. Such
milk may be treated by heat, and if so it must be in accordance with certain
conditions, and it must then be labelled "Grade A Milk (Pasteurised)."
Standards of bacteriological purity are laid down for the various grades.
Certified milk must not contain any Bacillus coli in ll/10th c.c.,
and not more than 30,000 bacteria per c.c.
Grade A (Tuberculin-tested).—Grade A milk shall not contain any time
before delivery to the consumer more than 200,000 bacteria per c.c., and
there must be no coliform bacillus in l/100th c.c. If such milk is
pasteurised it must not contain more than 30,000 bacteria per c.c., and no
coliform bacillus in 1 /10th c.c.
The Order with regard to pasteurised milk does not come into force
until 1924. Such milk must not be otherwise treated than by the method
specified, i.e. it must be retained at a temperature of not less than 145° F.,
and not more than 150° F., for at least 30 minutes, and must then be immediately
cooled to a temperature of not more than 55° F. It must not
contain more than 30,000 bacteria per c.c., and no Bacillus coli in 1 /10th c.c.
It must not be treated with heat more than once.
Producers are licensed by the Ministry and distributors by the local
authorities.

Arrangements were made under the sanction of the Ministry with the
Clinical Research Association to make the necessary bacteriological
examination of such samples of the above required by the Ministry to be
taken. During the year the Ministry ordered 10 samples to be submitted
for examination. One of the samples of "Certified Milk" contained
Bacillus coli, and the remainder were satisfactory from a bacteriological
standpoint.
A sample of "Certified Milk" was also taken in the ordinary way
under the Sale of Food and Drugs Act for chemical examination, and was
reported to be of "poor quality"—that is to say, just above the official
chemical standard.