A. The south wind (being much heated by the hot sands of Africa) imbibes water very plentifully, as it passes over the Mediterranean Sea and British Channel.
Q. Why does the saturation of the south wind cause rain?
A. As soon as it reaches our cold climate, it is condensed, and its vapour is squeezed out (as water from a wet sponge).
Q. Why are west winds in England generally rainy?
A. The west winds come over the Atlantic Ocean, and are laden with vapour: if, therefore, they meet with the least chill, some of the vapour is squeezed out.
Q. Why is a fine clear day sometimes overcast in a few minutes?
A. Because some sudden change of temperature has condensed the vapour of the air into clouds.
Q. Why are clouds sometimes dissipated quite as suddenly?
A. Because some dry wind (blowing over the clouds) has imbibed their moisture, and carried it off in invisible vapour.