A Crow perishing with thirst saw a pitcher, and, hoping to find water,
flew to it with great delight. When he reached it, he discovered to his
grief that it contained so little water that he could not possibly get
at it. He tried everything he could think of to reach the water, but all
his efforts were in vain. At last he collected as many stones as he
could carry, and dropped them one by one with his beak, into the
pitcher, until he brought the water within his reach, and thus saved
his life.
_Necessity is the mother of invention._