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
City of London 1939
[Report of the Medical Officer of Health for Port of London]
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14.
APPENDIX V.
INTERNATIONAL SANITARY CONVENTION.
DERATISATION CERTIFICATES:- The number issued during the period covered by this Report was 90:-
| No. of rats recovered | No. of mice recovered | ||
|---|---|---|---|
| Number of Vessels fumigated with Sulphur Dioxide | 33 | 501 | 32 |
| Number of Vessels fumigated with Hydrogen Cyanide | 56 | 643 | 527 |
| Number of Vessels fumigated with Hydrogen Cyanide and Sulphur Dioxide | 1 | 39 | _ |
| 90 | 1,183 | 559 |
PERATISATION EXEMPTION CERTIFICATES:- The number issued during the
year was 893.