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53
The milk used for school supplies is not purchased under any of the standards
specified in the Milk (Special Designations) Order, 1923, and a standard had to be
devised for what would be regarded as ordinary clean milk. The standard adopted
was : bacterial content, 300,000 per c.c., and B. Coli not to be present in 1/1,000 c.c.
If below this standard, the chief officer of supplies was informed that the milk could
not be regarded as satisfactory.
The contracts for the supply of milk to hospitals, prior to 1st October, 1931,
included raw milk, certified milk, grade A pasteurised milk, grade A (T.T.) and
pasteurised milk. These contracts were revised as from 1st October, 1931, to provide
for the supply of pasteurised milk only.
Under the provisions of the Milk (Special Designations) Order, 1923, graded
milks are required to conform to the following standards :—
Certified milk and Grade A milk Not more than 30,000 organisms per c.c. and must
pasteurised. not contain coliform bacillus in 1/10 c.c.
Grade A (tuberculin tested) milk Must not contain more than 200,000 organisms per
and grade A milk. c.c. and must not contain coliform bacillus in
1/100 c.c.
Pasteurised milk The milk must not contain more than 100,000
organisms per c.c.
For the purposes of supplies to hospitals the standard mentioned above as to
school supplies was applied to deliveries of raw milk, and as regards the presence
of B. Coli only in the case of pasteurised milk.