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 1909

[Report of the Medical Officer of Health for London County Council]

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DIAGRAM II.
Diagram shewing the number of files belonging to 6 principal
genera caught in balloons and on papert during the summer of 1909.