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
Marylebone 1898
[Report of the Medical Officer of Health for St. Marylebone]
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TABLE XII. —Report of Analyses of Water supplied to the Parish during June, 1898.
All results are expressed in grains per gallon.
(1) Chemical Examination.
| Description of Sample. | Appearance in Two-feet Tube. | Smell when heated to 100° Fahr. | Chlorine. | Phosphoric Acid. | Nitrogen as Nitrates. | Ammonia. | Albuminoid Ammonia. | Oxygen, absorbed in | Hardness, Clark's scale, in degrees. | Total solid matter dried at 220° Fahr. | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15 minutes atordn.tem. | 1 hour at 212° Fahr. | Before boiling. | After boiling. | |||||||||
| West Middlesex Water | Clear, & pale yellow. | .. | 1.25 | S. Trace | .1150 | .0003 | .0027 | .0014 | .1411 | 16.6 | 4.1 | 20.2 |
| Grand Junction Water | Do. | .. | 1.3 | ,, | .1231 | .0004 | .0006 | .0046 | .1442 | 16.7 | 3.9 | 21.1 |
(2) Microscopical Examination.
The West Middlesex water contained but little
suspended matter. No infusorial life was detected The
small sediment was mainly of a mineral character.
The Grand Junction was similar in its microscopical
characters to the West Middlesex, but there were a few
organic fibres, and the suspended particles were greater in
amount.