Errata corrections are indicated by blue dotted lines under the corrections. Scroll the mouse over the word and the original text will be displayed.

"Index" and "List of Authors Referred To" have been added to the Table of Contents.

Obvious punctuation and spelling errors, and inconsistent hyphenation have been corrected.

The remaining corrections made are indicated by red dotted lines under the corrections. Scroll the mouse over the word and the original text will be displayed.