It is so cold up there that the frost 'heaves' it.

You know what 'heaves' means?
The ground freezes and then thaws, and that loosens the pole.

Somebody has to pound it down, and that makes the noise we call thunder." Dotty said nothing to this; but her youthful face expressed surprise, largely mingled with doubt.
"You have heard of the _axes_ of the earth?
That is what they pound the pole with.

Queer--isn't it?
But not so queer to me as the Red Sea." Adolphus paused, expecting to be questioned; but Dotty maintained a discreet silence.
"The water is a very bright red, I know; but I never _could_ believe that story about the giant's having the nose-bleed, and coloring the whole sea with blood.

Did you ever hear of that ?" "No, I never," replied Dotty, gravely.