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7
The following table shows the proportional amount of
organic elements in each of the waters. The average amount
of these elements contained in the Kent Company's water
during nine years ending December, 1876, being taken as
unity:.
Sources.
Maximum.
Minimum.
Average.
Deep Wells
Kent
0.8
0.3
0.6
Colne Valley
2.2
0.8
1.2
Tottenham
2.6
0.7
1.2
River Lea
New River
3.7
0.6
1.4
East London
4.9
1.3
2.8
River Thames
Chelsea
4.6
1.4
2.9
West Middlesex
6.0
1.6
3.2
Southwark
4.9
1.6
3.0
Grand Junction
4.9
1.3
2.8
Lambeth
4.8
1.6
2.9
I cannot too strongly advise householders to filter all
water required for drinking purposes before using.
Meteorology.
The mean temperature of the air at Greenwich in 1888
was 47 7° Fahrenheit, which is considerably below the
average of 40 years.
The highest reading by day, 87.7°, was registered in
August, and the lowest reading by night, 10.8°, in February.
Rain fell on 167 days, the total amount of rainfall being
27.5 inches, or about two inches above the average.
I am, Gentlemen,
Faithfully yours,
FEED. WILKINSON,
Medical Officer of Health to the Lewisham District.