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37
In addition to the deposit gauges and lead peroxide candles which are sited at
three positions in the Borough, the results from which are recorded monthly as
shown in the above table, the Council has installed volumetric apparatus at the Town
Hall and the Disinfecting Station, Seven Sisters Road, respectively.The concentration
of smoke and sulphur-dioxide in the atmosphere is recorded daily and such information
is not only advantageous locally, but the daily findings are forwarded to the
Fuel Research Station for collation and comparison with other Metropolitan
Boroughs, in order that an overall picture may be obtained for the whole of London.
The measurement of smoke and sulphur-dioxide, respectively, is given in the
following table. It will be seen that the highest recordings were obtained in
December, this being due to the dense fog which occurred during the 2nd to 5th
of that month. At one time during this period visibility at Kew was down to 12
yards. It is interesting to note, however, that during the four days in question very
light winds were present.