Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Tottenham District]
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this and the three Charts immediately succeeding it illustrate the irregular periodicity of Small Pox Epidemics
Fig. 1.—Annual Death Rate per Million of Population in London from Small Pox, 1780—1902.