- Transcriber’s Notes:
- The references to figures 1 through 4 on pages 130 and 132 do not exist in any edition of the book. This has been confirmed by the Project Manager.
- Missing or obscured punctuation was silently corrected.
- Typographical errors were silently corrected.
- Inconsistent spelling and hyphenation were made consistent only when a predominant form was found in this book.