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]
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CLASSIFICATION OF ACUITY OF HEARING IN BOTH
EARS OF PATIENTS TREATED.
Defect when present was due to;—
CATARRHAL DEAFNESS, SUPPURATION OR
EXTERNAL OTITIS.
BEFORE AND AFTER TREATMENT.
Total Ears .. .. .. 302
UNITS HEARING LOSS