PRINTED BY J. AND C. F. CLAY,
AT THE UNIVERSITY PRESS.
TRANSCRIBER'S NOTE
Obvious typographical errors and punctuation errors have been corrected after careful comparison with other occurrences within the text and consultation of external sources.
A minus sign is represented by the n-dash character "–". Date and number ranges also use the n-dash "–".
Except for those changes noted below, all misspellings in the text, and inconsistent or archaic usage, have been retained. For example, co-exist, coexist; every-day, everyday; connexion; assertorial; apodeictic; premisses.
[§ 82], 'so Erdmannn confidently' replaced by 'so Erdmann confidently'.
[§ 150] Footnote [157], 'Delboeuf' replaced by 'Delbœuf' for consistency.
[§ 152], 'one subdivison must' replaced by 'one sub-division must'.
[§ 159] Footnote [167], 'Delboeuf' replaced by 'Delbœuf' for consistency.
[§ 204], 'and homogenous;' replaced by 'and homogeneous;'.