Transcriber's Note.

Apparent typographical errors have been corrected.

Combining characters have been used to add tildes and macrons to some letters. They may not work properly in some applications.

The Errata that follow the List of Illustrations have been incorporated in the text. Corrected words are linked back to the Errata section.

There are many Greek words in the text. Transliterations into Latin can be found, in the browser version, by hovering over them. Rough-breathing marks have been added to the first words of Footnotes 2 and 3.