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 Westminster, City of]
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Table 17.—Rodent Control
1969 | 1968 | |
---|---|---|
Complaints of rats received | 757 | 777 |
Complaints of mice received | 1,652 | 1,206 |
Total premises involved | 2,409 | 1,983 |
Premises rid of rats | 795 | 824 |
Premises rid of mice | 1,664 | 1,226 |
Total premises disinfested | 2,459 | 2,050 |
Inspections by Public Health Inspectors and visits by Rodent Officers to such places | 3,898 | 3,670 |
Intimation notices served | _ | _ |
Statutory notices served | 4 | 5 |
Table 18.—Chemical Examination of Water Supplied to City of Westminster—Average Results Milligrammes per Litre (unless otherwise stated)
Analysis Date | Source of Supply | |
---|---|---|
Stoke Newington | R. Thames Derived | |
Ammoniacal Nitrogen | 0.015 | 0.024 |
Albuminoid Nitrogen | 0.059 | 0.083 |
Nitrate Nitrogen | 4.7 | 4.4 |
Oxygen abs. from Permanganate 4 hrs. at 27°C. | 0.62 | 1.05 |
Hardness (total) | 314 | 282 |
Hardness (non-carbonate) | 84 | 79 |
Magnesium as Mg | 5 | 5 |
Sodium as Na | 30.8 | 24.0 |
Potassium as K | 5.3 | 5.4 |
Chloride as CI | 41 | 32 |
Phosphate as PO4 | 1.7 | 2.1 |
Silicate as Si02 | 10 | 9 |
Sulphate as SO4 | 68 | 58 |
Natural Fluoride as F | 0.25 | 0.25 |
Surface active material as Manoxol | 0.02 | 0.02 |
Turbidity Units | 0.0 | 0.1 |
Colour (Burgess units) | 7 | 11 |
pH value | 7.9 | 7.9 |
Electrical Conductivity (Microhms) | 630 | 550 |