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
London County Council 1899
[Report of the Medical Officer of Health for London County Council]
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23
It is worthy of note that after the beds had rested on Sundays an increased amount of nitrate
was found in the Monday effluent. There can be little doubt that this additional nitrate was
produced during the Sunday's rest, and was washed by the first effluent after the period of rest.
This result was specially marked in the case of the secondary beds.
Table 6.—Number of times the Coke.beds of Series A and B were filled each day, and the amount of Oxygen absorbed by the Crude Sewage and by the corresponding Coke.bed Effluents.
| Date, 1899. | Number of times filled daily. | Number of grains of oxygen absorbed from permanganate in four hours by one gallon of | ||||
|---|---|---|---|---|---|---|
| Crude sewage. | Effluent from series A. | Effluent from series B. | ||||
| Primary coarse bed. | Secondary coarse bed. | Primary coarse bed. | Secondary fine bed. | |||
| July 4th | Once | 4712 | 2.971 | 1.827 | 2.692 | 0.769 |
| ” 5th | ” | 4.615 | 3.269 | 1.827 | 2.596 | 0.865 |
| ” 6th | ” | 3.846 | 2.885 | 1.731 | 2.500 | 0.865 |
| ” 7th | ” | 4.135 | 2.500 | 1.731 | 2;692 | 0.769 |
| ” 8th | ” | 3.942 | 2.404 | 1.635 | 2;500 | 0.672 |
| ” 11th | ” | 3.750 | 3.077 | 2.115 | 2.212 | 0.769 |
| ” 12th | ” | 4.327 | 2.971 | 1.731 | 3.269 | 0.500 |
| ” 13th | ” | 4.327 | 2.692 | 1.635 | 2.971 | 0.672 |
| ” 14th | ” | 3.942 | 2.971 | 1.731 | 3.077 | 0.577 |
| ” 15th | ” | 4.423 | 2.596 | 1.346 | 2.692 | 0.672 |
| ” 17th | ” | 4.190 | 2.571 | 1.714 | 2.762 | 0.762 |
| ” 19th | ” | 4.476 | 2.857 | 2.857 | 2.952 | 1.909 |
| ” 21st | ” | 3.714 | 1.619 | 0.857 | 1.428 | 0.857 |
| ” 24th | ” | 3.908 | 2.285 | 1.809 | 2.476 | 0.761 |
| ” 26th | ” | 3.789 | 1.684 | 1.684 | 2;526 | 0.438 |
| ” 28th | ” | 4.210 | 2.315 | 1.263 | 2.241 | 0.438 |
| ” 31st | ” | 4.742 | 2.680 | 1.753 | 2.887 | 0.825 |
| August 2nd | ” | 3.918 | 2.268 | 1.649 | 2.474 | 0.722 |
| ” 4th | ” | 4.330 | 2.680 | 1.856 | 2.680 | 0.825 |
| ” 9th | ” | 3.196 | 2.577 | 1.237 | 2.577 | 0.825 |
| ” 11th | ” | 3.228 | 2.187 | 1.237 | 1.666 | 0.833 |
| ” 14th | ” | 4.700 | 2.800 | 1.500 | 2.600 | 0.700 |
| ” 16th | ” | 4.100 | 2.800 | 1.900 | 2.800 | 0.800 |
| ” 18th | ” | 3.600 | 2.000 | 2.300 | 2.100 | 0.800 |
| ” 21st | ” | 4.791 | 2.400 | 1.562 | 2.500 | 0.937 |
| ” 23rd | ” | 4.583 | 2.604 | 1.354 | 2.604 | 1.041 |
| ” 25th | ” | 4.791 | 2.500 | 1.458 | 2.291 | 1.145 |
| ” 28th | ” | 2.688 | 2.043 | 1.387 | 2.150 | 0.968 |
| ” 30th | ” | 3.978 | 2.258 | 1.387 | 2.043 | 0.860 |
| September 1st | ” | 4.387 | 2.427 | 2.142 | 1.436 | 1.020 |
| 4th | ” | 4.842 | 1.474 | 0.737 | 2.526 | 0.947 |
| ” 6th | ” | 4.687 | 2.812 | 1.875 | 2.708 | 0.937 |
| ” 8th | ” | 4.787 | 1.809 | 1.596 | 2.553 | 0.957 |
| ” 11th | ” | 4.105 | 2.842 | 1.684 | 2.421 | 0.947 |
| ” 13th | ” | 5.263 | 2.421 | 1.474 | 2.526 | 0.947 |
| ” 15th | ” | 4.255 | 2.340 | 1.489 | 2.234 | 0.745 |
| ”18th | ” | 4.680 | 2.659 | 1.170 | 2.234 | 0.851 |
| ” 21st | ” | 4.680 | 3.085 | 1.255 | 2.125 | 1.170 |
| ” 22nd | ” | 4.255 | 1.595 | 1.276 | 1.702 | 0.744 |
| ” 23rd | ” | 4.042 | 1.595 | 1.489 | 1.489 | 0.851 |
| ” 25th | ” | 4.361 | 2.659 | 1.808 | 2.659 | 0.744 |
| ” 26th | ” | 4.255 | 2.453 | 1.489 | 2.125 | 0.957 |
| ” 27th | ” | 4.680 | 3.085 | 1.914 | 2.659 | 1.255 |
| ” 28 th | ” | 4.479 | 2.708 | 1.770 | 2.604 | 1.250 |
| ” 29th | ” | 4.583 | 2.916 | 1.770 | 2.812 | 1.458 |
| October 2nd | ” | 4.895 | 3.541 | 1.979 | 3.854 | 0.833 |
| ” 3rd | ” | 4.631 | 1.786 | 1.489 | 2.812 | 0.947 |
| ” 4th | ” | 4.315 | 2.812 | 1.894 | 3.368 | 1.263 |
| ” 5th | ” | 4.631 | 2.659 | 1.474 | 2.812 | 1.157 |
| ” 6th | ” | 4.631 | 2.526 | 1.489 | 2.000 | 0.947 |
| ” 7th | ” | 3.568 | 2.421 | 1.894 | 2.812 | 0.842 |
| ” 13th | ” | 4.903 | 2.500 | 1.634 | 3.076 | 1.153 |
| ” 14th | ” | 4.903 | 2.798 | 2.692 | 2.980 | 0.865 |
| ” 16th | ” | 3173 | 1.923 | 1.346 | 1.538 | 0.961 |
| ” 17th | ” | 4.615 | 2.403 | 1.826 | 2.596 | 0.961 |
| ” 18th | ” | 4.444 | 2.500 | 1.730 | 2.403 | 1.153 |
| ” 19th | ” | 4.653 | 1.584 | 0.990 | 2.277 | 0.990 |