Transcriber’s Notes
Obvious typographical errors have been silently corrected. Variations in hyphenation have been standardised but all other spelling and punctuation remains unchanged.
The repetition of the "Author's Address to the Reader" has been removed.
The sequence of section numbers in Part II of the original is I-VI, VII, VII, VIII, XI. This has been corrected. The final entry in the TOC has also been corrected to page 187.