London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
London County Council 1931
[Report of the Medical Officer of Health for London County Council]
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diagram showing the mean distance (in miles) in all directions at which
objects could be distinguished at mid-day from the fleche at county
hall, during 1931 and 1926-1930.
diagram showing the mean distance (in miles} in the directions stated
at which objects could be distinguished at mid-day from the fleche at
county hall during the summer months and during the whole year,
1931 and 1926-1930.