Obvious punctuation and spelling errors repaired.

The oe and ae ligatures in the text has been left as it appears in the original book. If they do not display properly, you may have an incompatible browser or unavailable fonts. Make sure that the browser’s “character set” or “file encoding” is set to Unicode (UTF-8). You may also need to change your browser’s default font.

To preserve the flow of this text, all illustrations are hyperlinked.

Index added to Table of Contents.

The remaining corrections are indicated by red dotted lines under the corrections. Scroll over the word to see the original text.