Climate and Time in Their Geological RelationsNote 306 — Chapter XXX · THE PHYSICAL CAUSE OF THE MOTION OF GLACIERS.—THEORIES OF GLACIER-MOTION.Reading editionPhil. Mag., S. 4, vol. x., p. 303.◇Copy noteReturn to CHAPTER XXX. THE PHYSICAL CAUSE OF THE MOTION OF GLACIERS.—THEORIES OF GLACIER-MOTION.