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voden through a fine specimen of a Norwegian
pine forest.
The resinous odour of this forest was very
remarkable, and I suspect that there is some
foundation for the popular belief that breathing the air
of pine forests has a curative influence on cases of
hooping cough, bronchitis, and similar diseases.
It is certainly remarkable that the air of
gasworks should be credited with the same influence,
seeing that the believers in both of these remedies
are ignorant of the fact that they agree in being
largely charged with hydrocarbon vapours, and
that such hydrocarbon vapours have remarkable
powers of destroying bacteria, fungus germs, and
the other microscopic organisms with which our
profoundest investigators are now nearly
unanimous in connecting so many diseases. I find in
my diary a query suggested by the odour of this
forest, which at the time I intended to investigate,
but have since forgotten it, viz. whether there is
any special development of ozone in the midst of
such woods. We know that some hydrocarbons
have the power of ozonizing the air after the
manner of a stick of phosphorus, and the
ozonelike character of this pine-wood odour suggested
the possibility of such action proceeding here.
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