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 London County Council]
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FIGURE 1.
Photograph of seven fly papers exposed for a period of 72 hours in a small general shop in
the neighbourhood of Centre No. 2.
FIGURE 2.
Photograph of the ceiling of a room in the neighbourhood of Centre No. 3, showing deposits
of flv-excreta. It will be noticed that the excreta are most thickly deposited along the
margin of a newly-plastered patch in the ceiling shown at the top of the photograph.