Transcriber's note

• The book cover image was created by the transcriber and is placed in the public domain.
• Footnotes have been renumbered and moved to the end of the book.
• Blank pages have been skipped.
• Obvious printer errors have been silently corrected, after comparison with a later edition of this work. Greek text has also been corrected after checking with this later edition and with Perseus, when the reference was found.
• Original spelling, hyphenation and punctuation have been kept, but variant spellings were made consistent when a predominant usage was found.