If I were lecturing on an
imaginary "Hygeia," I should point out that the smoke of London
contains large quantities of these oils, and they, by coating the
drops of mist on which they condense, give the fog that haunts our
streets that peculiar richness which is so irritating and injurious to
the system, and, further, by preventing the water from being again
easily taken up by the air, prolong the duration of the fog. Make this
oil a marketable commodity, and another twenty years will see London
without a chimney; underground shafts will be run alongside the
sewers; into these shafts by means of a down draught all the products
of combustion from our fires will be sucked by local pumping stations,
and the oil condensing in the tubes will serve in turn to illuminate
our streets, instead of performing its former function of turning day
into night and ruining our health; but as I am not at all sure of the
engineering possibilities of such a scheme, I will leave its discovery
to some other abler prophet than myself.
(_To be continued_.)
* * * * *
ELECTRICAL LABORATORY FOR BEGINNERS.
BY GEO. M. HOPKINS.
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