[33] For a fuller account see the writer's "Autobiography of the Earth."
[34] The Archæan rocks are frequently placed in a separate group below the Palæozoic.
Transcriber's note:
Missing page numbers are page numbers that were not shown in the original text. A "List of Illustrations II" has been added to the text, for the convenience of the reader, to display Illustrations that were not included in the original "Illustrations" section. The original spelling of words, especially for place names, has been retained.