Would it make any difference to you?
Experiment: Breathe upon the cold glass; show condensed vapor.
Boil water; collect vapor on cold surface.
Recall vapor on windows.
Recall clothes drying.
Recall windows on washing day.
Explain how fine particles of water are carried through the air, and unite so as to be seen, when cold, in the breath, on windows, in clouds, in fog.
Explain how rainfall is caused.
Read “Children of the Clouds.”