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9
0.62 per 1,000 inhabitants. Of the 69 deaths, 5
were due to choleraic diarrhœa.
Water.
During the past year the total average daily
volume of water supplied to the inner circle of the
metropolis is estimated at 152,273,210 gallons,
being 8,000,000 gallons more than in the previous
year. The average consumption per head of population
was 29.0 gallons per day as compared with
28.4 gallons in the previous year. Of the total
volume, about 76,000,000 gallons were taken from the
Thames, 65,000,000 from the Lea, and 10,000,000
from deep wells in the chalk. The greatest amount
of organic impurity was found in the Thames water,
and the least in the deep well water. Of the Thames
water, that supplied by the Southwark Company was,
as regards organic impurity, the worst, owing probably
to the present inadequate storage capacity which it
possesses, whilst of the deep well waters that supplied
by the Kent Company was the best. The Thames
water, however, was of better average quality, as
regards organic impurity, during the past year than
in any of the previous 16 years, and the Lea water
better than in any of the previous 15 years.
The temperature of the Thames water supplied
by five companies varied from 42.8° in December to
72.5° in August. The temperature of the Lea water