Note 49 — GLACIAL PERIOD.

It Is desirable that the reader should look up these localities upon a map of Switzerland, that he may be impressed with the growing grandeur of these ancient glaciers, even while they were retreating into the heart of the Alps; for in proportion as they left the plain, the landscape must have gained in imposing effect in consequence of the isolation of these immense masses of ice, which in their united extension may have recalled rather the immensity of the ocean, than the grandeur of Alpine scenery.