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somewhat superior to the best of the Thames waters.
The Lea water delivered during the year 1891 was
also of worse average quality, as regards organic
contamination, than that delivered at any time since
the year 1882.
Table B shows the maximum, minimum, and
average proportions of organic impurity in each of the
waters, the average amount contained in the Kent
Company's water during the nine years ending
December, 1876, being taken as unity.
In Table C are recorded the results of observations
respecting the freedom from turbidity or otherwise of
various waters, and for the purposes of comparison,
the results of similar observations made in 1868 are
also included.
I have the honour to be,
Gentlemen,
Your obedient Servant,
JAMES STEVENSON,
. Medical Officer of Health.
Vestry Hall, Paddington,
June, 1892.