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 Erith]
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11
bogeys has been superseded by employing motor vehicles,
from the wells of which the sand cargo is transferred to
conveyor belt with a terminal discharge direct into the ship's
hold.
1956 | 1957 | ||
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