1. A few chapter sub-headings do not end with a period in the original. For consistency, obvious errors have been corrected by ending these with a period.

2. A few obvious misprints where sentences did not end with a period have been corrected.

3. The following misprints have been corrected:
    "which we pet in our" corrected to "which we put in our" (page 243)
    "Britian" corrected to "Britain" (page 271)

4. Other than the corrections listed above, printer's inconsistencies in spelling, punctuation, hyphenation and ligature usage have been retained.