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

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Hornsey 1960

[Report of the Medical Officer of Health for Hornsey, Borough of]

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SMOKE CONCENTRATION: READINGS DURING HOURS OF HEAVY CONCENTRATION

N.B. All readings are shown in microgrammes per cubic metre.

DateTimeArchway RoadShepherds Hill
a. m.p.m.
August
Wed. 31st7 - 8112030
September
Tue. 6th6-7120060
Wed. 7th7-8148010
„ „7 - 3133050
Thur. 8th6-71870180
Tue. 13th7-8108020
Thur. 15th7-865040
Fri. 16th11 - 1281070
Mon. 19th9-10104060
Wed. 21st9-1077030
Fri. 23rd8-976030
Mon. 26th6-7610less than 10
Tue. 27th7-891020
October
Tue. 4th7-8136070
„ „8-91620450
Wed. 5th9-10106080
Fri. 7th9-101210110
Mon. 17th7-81440280
„ „11 - 121600680

Comparison of Recordings
During past years 68 London sites showed overall averages for
smoke concentrations as follows:-
Summer (April to September) 100
Winter (October to March) 310
Yearly (April to March) 209
Sample results under special atmospheric conditions were as
follows:-
5th - 8th December 1952 - The Great London Smog. The average
concentration in the Thames Valley was 3750. At Woolwich figures
of 5430 and 5220 were recorded.
During November 1959, hourly readings were taken at Greenwich during
light fog conditions and the maximum reading obtained over three days
was 3600.
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