London's Pulse: Medical Officer of Health reports 1848-1972

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Kensington 1890

[Report of the Medical Officer of Health for Kensington]

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250
the subject earnestly, having addressed the Board of Trade (in
July, 1889) with a view to (1) providing a trustworthy standard
of light (2) prescribing a standard photometer with which all
official photometers should be compared, and (3) giving legal
force to tests made with a portable photometer; the reasons for
which are fully set out in the Committee's communication. No
action appears to have been taken in the matter at present by the
Board of Trade.
2. As regards Purity. The gas was free from sulphuretted
hydrogen throughout the year; and the quarterly average
quantity of other sulphur compounds present in the gas, was considerably
less than the quantity permitted; the maximum, moreover,
not having been attained on any occasion. But, as will be
seen in the following table, the maximum, the minimum, and the
average amounts actually found in 1890, considerably exceeded
the proportions in 1889, as these exceeded those found in
1888.

Grains of sulphur per 100 cubic feet of gas; the Parliamentary limit being 17 grains in 100 cubic feet during the months from April to October, and 22 grains from October to April: —

Maximum.Minimum.Average
Quarter ended March 31st15.210.812.7
Quarter ended June 30th15.810.912.5
Quarter ended September 30th15.810.313.5
Quarter ended December 31st17.110.813.6
Averages, whole year16.010.713.1
Averages, 188914.09.311.0
Averages, 188812.77.89.7
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Ammonia, a valuable residual product of gas manufacture,
was present in the gas more or less frequently throughout the
year, but only in slight quantities. On no occasion was the limit
fixed by the Acts of Parliaments—viz., four grains in 100 feet
of gas—exceeded.


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