ET us now go to Switzerland, and see its wonderful mountains, whose steep, rocky sides are covered with trees. We will climb up to the fields of snow, and then make our way down to the grassy valleys, with their countless streams and rivulets, impetuously rushing to lose themselves in the sea. The sunshine is hot in the narrow valley; the snow becomes firm and solid, and in the course of time it either descends as an avalanche, or creeps along as a glacier.