Obvious typographical errors and punctuation errors have been
corrected after careful comparison with other occurrences within
the text and consultation of external sources.
Except for those changes noted below, all misspellings in the text,
and inconsistent or archaic usage, have been retained.
Pg 116, 'immedate contact' replaced by 'immediate contact'.
Pg 119, 'and attennuation in' replaced by 'and attenuation in'.
Pg 126, 'Tue valuable paper' replaced by 'The valuable paper'.
Pg 132, 'probably impossibly' replaced by 'probably impossible'.