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27
though excretal organisms were not demonstrated. The next
sample showed the presence of free chlorine which kept down the
bacterial content to 360 per c.c., though this time B.Coli and
streptococci were present in 10 c.c. This sample, again, gave high
ammonia and oxygen absorption figures, indicating pollution which
in this case was not controlled by chlorination. These results
suggested that unless some restriction were to be placed on the
number of bathers, the purification processes would need to be
augmented.
Under existing arrangements the water is filtered and subsequently
chlorinated. The capacity of the filtration plant, however,
does not permit of a turnover more rapidly than once in every
eight hours. It was decided, therefore, to instal during the winter
months an additional filtration plant capable of dealing with
45,000 gallons per hour which would permit of a turnover of
4½ hours. The plant will consist of two 8-feet diameter pressure
filters filled with quartz to a minimum of 3 feet. Alumina-ferric
will be added as a coagulant to the water in its passage to the
filter, and subsequent neutralization will be effected by the addition
of soda ash.
schools.

School attendance has played little part in the spread of the
notifiable infections. No schools were closed during the year
on the action of the sanitary authority, and no premises disinfected.
establishments for massage or special
treatment.
The Council adopted Part VII of the Middlesex County
Council Act, 1934, regarding establishments for massage and
special treatment which are defined as premises for the reception
or treatment of persons requiring (a) massage, manicure or