Q. Why is a halo round the moon a sure indication of rain?
A. Because the halo is caused by fine rain falling in the upper regions of the air. The larger the halo the nearer the rain-clouds, and the sooner may rain be expected.
Q. Why does a black mist bring wet weather?
A. The mist is black, because it is overshadowed by dense clouds or masses of vapour; and, therefore, it forebodes wet.
Q. Why does a white mist indicate fine weather?
A. The mist is white, because no clouds blacken it with their shadow; and (as the sky is cloudless) fine weather may be expected.
Q. Why do we feel almost suffocated in a hot cloudy night?
A. Because the heat of the earth (being unable to escape into the upper region of the air, in consequence of the clouds) floats, like a sea of heat, on the surface of the earth.
Q. Why do we feel more sprightly in a clear bright night?