A. Because the heat is constantly increasing; and the capacity of the air to absorb and retain moisture increases likewise.
Q. Why is there more wet from August to March, than there is from March to August?
A. Because the heat is constantly decreasing, and the capacity of the air to retain moisture decreases also; so that (although it often rains) yet the air is always on the point of saturation.
Q. Why does the mercury of a barometer rise in a frost?
A. Because frost condenses the air; and condensed air is heavier than rarefied air.
Q. Why does the mercury of a barometer fall in a thaw?
A. Because the air is both warmer (or more rarefied), and also filled with vapour.
Q. What does a sudden rise or fall of the barometer indicate?
A. If the rise be sudden, fine weather will not continue long: