Climate and Time in Their Geological RelationsNote 149 — Chapter XVII · FORMER GLACIAL EPOCHS.—REASON OF THE IMPERFECTION OF GEOLOGICAL RECORDS IN REFERENCE TO THEM.Reading edition“Short American Tramp,” pp. 77, 81, 111.◇Copy noteReturn to CHAPTER XVII. FORMER GLACIAL EPOCHS.—REASON OF THE IMPERFECTION OF GEOLOGICAL RECORDS IN REFERENCE TO THEM.