1. Added table of Contents.
2. Silently corrected obvious typographical errors and variations in
spelling.
3. Retained archaic, non-standard, and uncertain spellings as printed.
4. Re-indexed footnotes using numbers.
5. Enclosed italics font in _underscores_.
6. Enclosed bold or blackletter font in =equals=.
7. Denoted superscripts by a caret before a single superscript
character or a series of superscripted characters enclosed in
curly braces, e.g. M^r. or M^{ister}.
8. Denoted subscripts by an underscore before a series of subscripted
characters enclosed in curly braces, e.g. H_{2}O.