The original spelling, hyphenation, and punctuation have been retained,
with the exception of apparent typographical errors which have been
corrected.
Ambiguous hyphens at the ends of lines were retained.
Punctuation and spelling were made consistent when a predominant
form was found in this book; otherwise they were not changed.
Mid-paragraph illustrations have been moved between paragraphs
and some illustrations have been moved closer to the text that
references them. The List of Illustrations paginations were
changed accordingly.
Footnote numbers [1] on pages 68, 186 and 188 are duplicated in the
original text and have no corresponding footnotes.