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 1931
[Report of the Medical Officer of Health for Port of London]
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| Date. | Sample. | Analyst's Report. | Action taken. | |||
|---|---|---|---|---|---|---|
| 1931. | ||||||
| Mar. 6 | Rock Salt | Sample marked | U.C.3. | U.C.S. | Consignment released. | |
| Total matter insoluble in water | 0.552% | 0.189% | ||||
| The above were found to contain:— | ||||||
| Siliceous matter | 0.121% | 0.003% | ||||
| Iron as Fe203 | 0.003% | 0.003% | ||||
| Calcium Carbonate (CaC03) | 0.412% | 0.138% | ||||
| Magnesium ,, (MgCQ3) | 0.006% | 0.007% | ||||
| Unestimated | 0.010% | 0.038% | ||||
| The amounts of insoluble matter in the above samples are not, in my opinion, excessive and not likely to be harmful, if the salt is used for dietetic purposes." | ||||||
| " 12 | Rock Salt | Sample marked | M.C. | U.C.O. | No Mark. | Consignment released. |
| Total matter insoluble in water | 0.071% | 0.296% | 0.008% | |||
| The above were found to contain: — | ||||||
| Siliceous matter | 0.014% | 0.008% | 0.004% | |||
| Iron as Fe203 | 0.011% | 0.053% | Traces. | |||
| Calcium Carbonate (CaC03) | 0.037% | 0.206% | Traces. | |||
| Magnesium ,, (MgC03) | 0.006% | 0.028% | Traces. | |||
| Unestimated | 0.003% | 0.001% | — | |||
| The amounts of insoluble matter in the above samples are not, in my opinion, excessive and not likely to be harmful, if the salts are used for dietetic purposes. M.C. and No Mark are samples of exceptional purity." | ||||||
| „ 17 | Pure Thick Sterilized Cream | This sample, on analysis, gave the following results:— | Consignment released. | |||
| Fat | 26.98% | |||||
| Non-fatty solids | 5.63% | |||||
| Water | 67.39% | |||||
| Neither preservatives nor thickeners were detected in the sample." | ||||||
| April 4 | Vegetable Fat | This sample, on analysis, gave the following results:— | Consignment released. | |||
| Reichent-Wollny value | 0.8% | |||||
| Polenske value | 1.5% | |||||
| Unsaponifiable matter | 0.5% | |||||
| Iodine value | 61.33% | |||||
| Nickel | Traces. | |||||
| "The above figures are quite consistent with the sample being a hardened oil of vegetable origin, probably cottonseed oil or stearin." | ||||||
| „ 10 | Shrimp Extract.. | On analysis, the sample gave the following results: — | Consignment released. | |||
| Moisture | 32.30% | |||||
| Oil | 3.25% | |||||
| Mineral matter | 5.82% | |||||
| Including salt ... | 3.29% | |||||
| "The sample was also examined, with negative results, for preservatives (formalin, boric acid, sulphites, &c.), and poisonous metals. In addition, the sample showed no signs of putrefaction, even after being kept for several days at 70° to 80° F., and I am unable, therefore, apart from the unpleasant smell and general appearance of the sample, to take exception to it, or to state that it would be harmful to health.'' | ||||||
| „ 20 | Crude Molasses | This sample, on analysis, gave the following results: — | Consignment released. | |||
| Oily matter | 0.77% | |||||
| " Although the above will, no doubt, make the molasses unsaleable in its present condition, I do not consider that it can be classed as injurious to health." | ||||||
| May 14 | Butter | These samples, on analysis, gave the following results: — | Consignment released. | |||
| No. 1. | No. 2. | |||||
| Moisture | 13.01% | 11.28% | ||||
| Reichert-Wollny value | 29.1% | 28.2% | ||||
| Polenske value | 2.8% | 2.6% | ||||
| Kirschener value | 24.1% | 24.0% | ||||
| "In addition, the samples were found to be free from preservatives." | ||||||