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18
Amongst the inorganic was—
Chlorine 0.69 grains per gallon.
Sulphuric acid 1.36 „ „
The chlorine indicates the presence of common salt in
the proportion of 1.13 grains to the gallon.
Degrees, or grains of
lime per gallon.
The hardness permanent, i. e., that which
remains after boiling
Temporary, i.e., removed by boiling .
Total hardness
4.8
7.9
12.7
The Seine water contained—
Organic impurity
Inorganic
Total
3.40
23.84
27.24
grains per gallon
Amongst the inorganic—
Chlorine
Sulphuric acid.
0.27
4.94
grains per gallon.
„ „
Hardness permanent
„ Temporary
Total
Grains or degrees
per gallon.
9.8
6.2
16.0
By this it will be seen that the London water was
superior to the Parisian, so far as the chemistry of these two
samples can decide it, both in wholesomeness as a drink,
and for cooking and washing. The London water contained
a trifle more common salt; a thing which always
creates suspicion of contamination by the animal