TRANSCRIBER’S NOTE

Footnote anchors are denoted by [number], and the footnotes have been placed at the end of the book.

Basic fractions are displayed as ½ ⅓ ¼ etc; other fractions are shown in the form a/b, for example 1/25.

All changes noted in the [ERRATA] on page vii have been applied to the etext. Each change is indicated by a dashed blue underline.

The cover image was created by the transcriber and is placed in the public domain.

Some minor changes to the text are noted at the [end of the book.] These are indicated by a dotted gray underline.