2ndly—The vapours (being rarefied) ascend to the more elevated regions, where the cold is greater than it is nearer the earth.
Q. What two things are essential to cause HAIL?
A. Two strata of clouds having opposite electricities, and two currents of wind. The lower cloud (being negative) is the one precipitated.
Q. What is rain?
A. The vapour of the clouds or air condensed, and precipitated to the earth.
Q. Why is the vapour of the air or clouds precipitated?
A. When the air is saturated with vapour, if a cold current condenses it, it is no longer able to hold all its vapour in solution, and some of it is squeezed out, and falls as rain.
Q. Why does rain fall in drops?
A. The vapoury particles in their descent attract each other; and those which are sufficiently near, unite and form into a drop.