Transcriber's Note:

Obvious typographical errors have been corrected. Inconsistent spelling and hyphenation in the original document have been preserved.

D'Appligny was changed to D'Apligny.

Gallium was changed to Galium.

Page 132: a "Note" was anchored, and added to the footnote sequence.

Inconsistent punctuation and capitalization of lists, chapter headings, and footnotes was retained.

The listed Errata were corrected.