E-text prepared by Louise Hope, David Newman, Chuck Greif,
and the Project Gutenberg Online Distributed Proofreading Team
(http://www.pgdp.net/)
This file includes musical examples in MIDI format. Depending on your browser, these files may play when clicked, or may need to be downloaded and played in a separate application.
A few typographical errors have been corrected. They have been marked in the text with mouse-hover popups.