And fever, and pain,
Hovering round, settling down
In the closeness and heat:
Let the wind sweep right through
Till the air’s fresh and sweet.
And more cheerful you’ll feel
Through the toil of the day;
More refreshed you’ll awake
When the night’s pass’d away.”[[291]]
Plants and flowers ought not to be allowed to remain in a chamber at night. Experiments have proved that plants and flowers take up, in the daytime, carbonic acid gas (the refuse of respiration), and give off oxygen (a gas so necessary and beneficial to health), but give out in the night season a poisonous exhalation.