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 St. Marylebone]
This page requires JavaScript
TABLE VII.—Report of Analyses of "Water supplied to the Parish during January, 1899.
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 2120 Fahr. | Before boiling. | After boiling. | |||||||||
West Middlesex Water January, 1899 | Clear, & pale yellow. | 1.3 | s. Trace | •1300 | .000 | •0029 | •0220 | .2000 | 15.4 | 3.7 | 20.0 | |
—Average composition for January | Do. | ... | 1.3 | ,, | •1420 | •0016 | •004 | •0357 | •1521 | 17.7 | 4.5 | 21.1 |
Grand J unction Water January, 1899 | Do. | ... | 1.3 | 9 9 | •2411 | .0005 | .0047 | •0311 | •1821 | 18.6 | 4.9 | 21.2 |
—Average composition for January | Do. | ... | 1.3 | , , | .1620 | •0006 | •0044 | .0444 | •1722 | 18.7 | 4.8 | 20.1 |
(2) Microscopical Examination,
Deposit small. Mostly mineral matter. No life'
absence of organised fibres.
(3) Bacteriological Examination.
Mr. Meredith Blyth, B.Sc. (Lond.), reports in a tabular form as follows:—
Total number per c.cs. | Spore-bearing organisms in 10 c.cs. | Total number of organisms growing on phenol-gelatine. | Bacillus Coli Communis. | Bacillus Sporogenes Enteritidis (Klein.) | |
---|---|---|---|---|---|
42 | 10 | 31 | - | - | |
West Middlesex | 36 | 2 | 20 | - | - |