How does Carl N. Degler use imagery in Out of Our Past: The Forces That Shaped Modern America?

Imagery:

"The Puritans prohibited bear-baiting not because of torture to the bear, but because of the pleasure it afforded the spectators."

"Railroad iron is a magician's rod in its power to evoke the sleeping energies of land and water."

"The United States appeared as the bright luminary of the western hemisphere whose radiance will extend across the Atlantic's broad expanse and light the whole world to freedom and happiness."