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 1945
[Report of the Medical Officer of Health for Port of London]
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Table. H
DERATISATION CERTIFICATES AND DERATISATION EXEMPTION CERTIFICATES ISSUED DURING THE YEAR.
| Net Tonnage. | No. of Ships. | Number of Deratisation Certificates Issued. | Number of Deratisation Exemption Certificates Issued. | Total Certificates Issued. | ||||
|---|---|---|---|---|---|---|---|---|
| After fumigation with | After trapping poisoning etc. | TOTAL. | ||||||
| HCN. | SO2. | HCN. & SO2. | ||||||
| Ships up to 300 tons | 28 | 6 | - | - | - | 6 | 22 | 28 |
| Ships from 301 to 1,000 tons | 65 | 31 | - | - | - | 31 | 34 | 65 |
| " " 1,001 to 3,000 tons | 105 | 51 | 1 | - | - | 52 | 53 | 105 |
| " " 3,001 to 10,000 tons | 300 | 115 | 4 | - | - | 119 | 181 | 300 |
| Ships over 10,000 tons | 9 | 7 | - | - | - | 7 | 2 | 9 |
| 507 | 210 | 5 | " | 215 | 292 | 507 | ||