Words or letters contained within underscores, i.e. _Proceedings_,
indicate italics in the original.
Letters or numbers preceded by ^ (carat) indicate superscripts.
Multiple letter superscripts are contained within { } brackets.
Initials followed by a period (.) and contained within [ ] brackets
indicated a superscript letter above a period. For example: J^[S.]C.
Footnotes have been moved to the end of each section.
The List of Illustrations has been added to this project as
an aid to the reader. It does not appear in the original
book.
Additional notes can be found at the end of this text.