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91
Period.
No.
Analysed
Fat.
%
Non-fatty
Solids.
%
January 2 4.25 8.70
February 23 3.56 8.80
March 36 3.38 8.52
April 20 3.56 8.66
May 36 3.38 8.83
June 11 3.33 8.80
July 29 3.53 8.83
August 22 3.67 8.78
September 30 3.52 8.80
October 11 3.62 8.93
November 15 3.71 8.82
December 24 3.72 8.85
Whole year 259 3.53 8.77
In addition to those examined under the Food and Drugs
Act, fifty-four milk samples were submitted to the phosphatase
test to determine whether the milk had been
adequately pasteurised. The test is a comparatively new
one, and included in the fifty-four were a series of samples
submitted in connection with some experiments carried out
to check the efficiency of the test.
Hammersmith is a centre of the wholesale dairy trade,
and some of the largest pasteurising plants in the country
are situated within the Borough. Any new method of checking
whether the pasteurising process has been properly
carried out is of great value, and particular interest has
therefore been taken in the phosphatase test.
I have commented in some of my recent reports upon
certain of the experiments which I have had carried out,
and the following notes upon the further tests may be of
interest.
It is the custom of many retail dairymen in London,
when a sample is taken under the Food and Drugs Act, to
return the portion handed to them by the sampling officer
to the wholesale dairy company for analysis. One of the
largest companies in the Borough make it a practice to
apply the phosphatase test to all of these samples in addition
to carrying out a chemical analysis.